A mystery in paradise unfolds when Sarm Heslop vanishes from her boyfriend's luxury yacht in the U.S. Virgin Islands; chilling details emerge on the case that made international headlines and left investigators with more questions than answers.

After a devoted father is found murdered in his home, Indiana investigators learn just how manipulative and deadly a person's envy can be.

When Jaclyn Martin's life of comfort is jeopardized, she orchestrates the killing of her husband, a beloved neighborhood bar owner.

When a young mother disappears after leaving her infant in the care of her local pastor and his wife, Florida detectives search for her for five years, uncovering a web of secrets and lies.

Two murders in Toronto ignite an investigation that spans four decades, but breakthroughs in investigative genetic genealogy help crack the case; Josh Mankiewicz revisits the mystery that took him to the coldest and most remote place he's ever been.

When the body of an Atlanta police lieutenant is discovered floating in a lake and riddled with bullets, detectives work tirelessly to bring justice to their fallen comrade.

Sophisticated crime fighters map the psychological and physical terrain of multiple murderers.

After a wrathful killer strikes a small Alaskan village, investigators must untangle a truly twisted romance to find out what led to this rage-filled stabbing.

An Army veteran delivers a parcel to his neighbor, but instead of receiving gratitude, he ignites a war between the two military men that spirals out of control, until the feud finally ends in a hail of bullets.

Sophisticated crime fighters map the psychological and physical terrain of multiple murderers.

The unofficial mayor of an idyllic suburban street locks horns with the new neighbor who shows no respect for local values; disagreements escalate to arguments, threats, and property damage, ending in brutal violence that shatters two families.

An Army veteran delivers a parcel to his neighbor, but instead of receiving gratitude, he ignites a war between the two military men that spirals out of control, until the feud finally ends in a hail of bullets.

Sophisticated crime fighters map the psychological and physical terrain of multiple murderers.

When the half-dressed, partially frozen body of a Navy veteran is found lying in a ditch, rumors and lies will challenge detectives' efforts to lay bare the truth behind the chilling death.

The unofficial mayor of an idyllic suburban street locks horns with the new neighbor who shows no respect for local values; disagreements escalate to arguments, threats, and property damage, ending in brutal violence that shatters two families.

Sophisticated crime fighters map the psychological and physical terrain of multiple murderers.

When 19-year-old Anton Black dies while being taken into police custody, the community seeks justice; a yearlong "Dateline" investigation looks at the officer at the center of the case and missed warning signs.

When the half-dressed, partially frozen body of a Navy veteran is found lying in a ditch, rumors and lies will challenge detectives' efforts to lay bare the truth behind the chilling death.

After a wrathful killer strikes a small Alaskan village, investigators must untangle a truly twisted romance to find out what led to this rage-filled stabbing.

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

The disappearance of a well-respected Georgia man triggers an investigation into the dangers of online dating and reveals a disturbing plot borne of lust and greed.

When a beloved grandfather is found shot dead in his Florida home, detectives fear his missing ex-wife is also in danger; as they uncover a tangled web of romance, infidelity and betrayal, new questions arise about her involvement in the murder.

A father of four vanishes days before Christmas; what authorities believe to be a bond violation, unfolds into something evil.

When 19-year-old Anton Black dies while being taken into police custody, the community seeks justice; a yearlong "Dateline" investigation looks at the officer at the center of the case and missed warning signs.

When the half-dressed, partially frozen body of a Navy veteran is found lying in a ditch, rumors and lies will challenge detectives' efforts to lay bare the truth behind the chilling death.

After a wrathful killer strikes a small Alaskan village, investigators must untangle a truly twisted romance to find out what led to this rage-filled stabbing.

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

The disappearance of a well-respected Georgia man triggers an investigation into the dangers of online dating and reveals a disturbing plot borne of lust and greed.

When a beloved grandfather is found shot dead in his Florida home, detectives fear his missing ex-wife is also in danger; as they uncover a tangled web of romance, infidelity and betrayal, new questions arise about her involvement in the murder.

A father of four vanishes days before Christmas; what authorities believe to be a bond violation, unfolds into something evil.

When a small-town preacher is hospitalized with a mysterious illness, North Carolina police uncover a string of suspicious deaths centered around a Burlington woman who has a hidden dark side.

The peaceful life of a retired North Carolina couple is shattered when a husband's body is found in his own garage, leaving investigators to sort out fact from fiction with the help of his wife.

After a bizarre account of suspected false identity is reported, authorities uncover a long history of an evasive criminal and launch a nationwide hunt to catch a killer who uses Southern charm as a weapon of deception.

After a hardworking mother is trapped and killed in a California house fire, investigators sift through multiple theories to figure out who could have ignited the deadly blaze.

Police discover a murdered teenage girl was involved in a love triangle.

Todd Kendhammer claims his wife was killed in a freak car accident but the forensic evidence doesn't back him up.

When a small-town preacher is hospitalized with a mysterious illness, North Carolina police uncover a string of suspicious deaths centered around a Burlington woman who has a hidden dark side.

The peaceful life of a retired North Carolina couple is shattered when a husband's body is found in his own garage, leaving investigators to sort out fact from fiction with the help of his wife.

After a bizarre account of suspected false identity is reported, authorities uncover a long history of an evasive criminal and launch a nationwide hunt to catch a killer who uses Southern charm as a weapon of deception.

After a hardworking mother is trapped and killed in a California house fire, investigators sift through multiple theories to figure out who could have ignited the deadly blaze.

Post 9/11, terror strikes again when Queens and Brooklyn are rocked by the senseless killing of neighborhood shopkeepers; with no leads and a lack of motive, the NYPD must form a task force to catch the spree killer before he claims his next victims.

The abduction of a Hasidic man from his Williamsburg office sparks an intense NYPD search; as more dark details emerge, discoveries of debts, betrayal and ties to the Russian mob send police on a mission for the truth.

When a college student goes missing, a search of her Bronx apartment leads the NYPD to suspect foul play; the investigation stalls until a witness comes forward, prompting an undercover sting operation that blows the lid off a deadly conspiracy.

When prominent Latino journalist and activist Manuel de Dios Unanue is fatally shot at a Queens restaurant, a joint task force must figure out which of a long list of enemies, including some international terror groups, is behind his execution.

Two California men are at each other's throats over access to a disputed road, and things progress from intimidation and property damage to one of the most shocking murders the area has ever seen.

When an attempted armed robbery ends in murder, U.K. detectives must connect the dots between hours of surveillance video.

Post 9/11, terror strikes again when Queens and Brooklyn are rocked by the senseless killing of neighborhood shopkeepers; with no leads and a lack of motive, the NYPD must form a task force to catch the spree killer before he claims his next victims.

The abduction of a Hasidic man from his Williamsburg office sparks an intense NYPD search; as more dark details emerge, discoveries of debts, betrayal and ties to the Russian mob send police on a mission for the truth.

When a college student goes missing, a search of her Bronx apartment leads the NYPD to suspect foul play; the investigation stalls until a witness comes forward, prompting an undercover sting operation that blows the lid off a deadly conspiracy.

When prominent Latino journalist and activist Manuel de Dios Unanue is fatally shot at a Queens restaurant, a joint task force must figure out which of a long list of enemies, including some international terror groups, is behind his execution.

Two California men are at each other's throats over access to a disputed road, and things progress from intimidation and property damage to one of the most shocking murders the area has ever seen.

When an attempted armed robbery ends in murder, U.K. detectives must connect the dots between hours of surveillance video.

A charismatic young woman meets a dynamic and handsome man at an Orlando nightclub, and it seems like a perfect match, but a secret marriage and a lover who just can't let go spells doom for two innocent victims.

After 25 years of a mostly beautiful marriage, a woman loses her husband in a brutal killing inside their own home; what at first seems to be a robbery-gone-bad is revealed to be a vicious and carefully plotted murder.

The disappearance of millionaire Frank Black.

CSIs determine that a girl's ex-husband had his parents assassinate her.

A young woman is found with a fatal head wound and her hand on a shotgun; her fiancé claims she killed herself, but grieving family members insist the suicide scene was staged; the case goes cold until a new prosecutor takes a second look.

A beloved grandmother is found with a red bathrobe sash knotted around her neck; her death appears to be a suicide until the medical examiner rules homicide; the victim's husband is charged with murder, but the case takes a surprising turn.

Post 9/11, terror strikes again when Queens and Brooklyn are rocked by the senseless killing of neighborhood shopkeepers; with no leads and a lack of motive, the NYPD must form a task force to catch the spree killer before he claims his next victims.

The abduction of a Hasidic man from his Williamsburg office sparks an intense NYPD search; as more dark details emerge, discoveries of debts, betrayal and ties to the Russian mob send police on a mission for the truth.

When a college student goes missing, a search of her Bronx apartment leads the NYPD to suspect foul play; the investigation stalls until a witness comes forward, prompting an undercover sting operation that blows the lid off a deadly conspiracy.

When prominent Latino journalist and activist Manuel de Dios Unanue is fatally shot at a Queens restaurant, a joint task force must figure out which of a long list of enemies, including some international terror groups, is behind his execution.

A couple moves to an idyllic California beach town and hits it off with their new neighbors, then one of the wives descends into drugs and madness, terrorizing the other.

When neighbors stand up to a bully after his dog bites their son, a grudge he's been nursing for decades finally explodes into a frenzy of violence.

When a freewheeling family moves from California to the conservative enclave of Leesburg, Va., they get on the wrong side of one of their neighbors, and the conflict escalates until bullets fly and blood flows in the street.

A charismatic young woman meets a dynamic and handsome man at an Orlando nightclub, and it seems like a perfect match, but a secret marriage and a lover who just can't let go spells doom for two innocent victims.

After 25 years of a mostly beautiful marriage, a woman loses her husband in a brutal killing inside their own home; what at first seems to be a robbery-gone-bad is revealed to be a vicious and carefully plotted murder.

A Virginia father is reported missing two years after he was last seen; as the investigation ensues to track down his last location, a disturbing discovery will expose two mysterious deaths tied to a greedy scheme.

In the middle of the night, a gunman kills reformed ex-gang member Aaron Iturra while asleep in his bed; Oregon detectives piece together the link between a mysterious phone call, a local anti-gang activist and a stolen pack of cigarettes.

A young woman is found with a fatal head wound and her hand on a shotgun; her fiancé claims she killed herself, but grieving family members insist the suicide scene was staged; the case goes cold until a new prosecutor takes a second look.

A beloved grandmother is found with a red bathrobe sash knotted around her neck; her death appears to be a suicide until the medical examiner rules homicide; the victim's husband is charged with murder, but the case takes a surprising turn.

A charismatic young woman meets a dynamic and handsome man at an Orlando nightclub, and it seems like a perfect match, but a secret marriage and a lover who just can't let go spells doom for two innocent victims.

After 25 years of a mostly beautiful marriage, a woman loses her husband in a brutal killing inside their own home; what at first seems to be a robbery-gone-bad is revealed to be a vicious and carefully plotted murder.

The disappearance of millionaire Frank Black.

CSIs determine that a girl's ex-husband had his parents assassinate her.

A Virginia father is reported missing two years after he was last seen; as the investigation ensues to track down his last location, a disturbing discovery will expose two mysterious deaths tied to a greedy scheme.

Criminals are betrayed by the clues their own bodies leave behind.

After a young California father is ambushed on the steps of his own home, Santa Clara detectives uncover a complex murder plot that ultimately leads them to an unexpected mastermind who's been hiding in plain sight all along.

The mountain road between them fails to keep two long-time neighbors from tormenting each other; seemingly small events bring their decadeslong hostility to a bloody boil, and property lines become battle lines in a fight to the death.

Criminals are betrayed by the clues their own bodies leave behind.

An apartment-dwelling family finds their peace and quiet shattered when a loud neighbor moves into the unit directly overhead; the conflict engulfs both sides resulting in flying fists, drawn weapons, and a man left bleeding out in the hallway.

The mountain road between them fails to keep two long-time neighbors from tormenting each other; seemingly small events bring their decadeslong hostility to a bloody boil, and property lines become battle lines in a fight to the death.

Criminals are betrayed by the clues their own bodies leave behind.

A home invasion turns deadly on Easter night; as Ohio authorities hunt for the assailant, they discover that the attack may not have been as random as first thought.

An apartment-dwelling family finds their peace and quiet shattered when a loud neighbor moves into the unit directly overhead; the conflict engulfs both sides resulting in flying fists, drawn weapons, and a man left bleeding out in the hallway.

Criminals are betrayed by the clues their own bodies leave behind.

When a 23-year-old woman goes missing from a shopping mall in Plano, Texas, her family searches for her, and the police seek out who is responsible for her disappearance.

A home invasion turns deadly on Easter night; as Ohio authorities hunt for the assailant, they discover that the attack may not have been as random as first thought.

After a young California father is ambushed on the steps of his own home, Santa Clara detectives uncover a complex murder plot that ultimately leads them to an unexpected mastermind who's been hiding in plain sight all along.

A former marine who once was the hero for a woman in an abusive marriage may have let his desire to help go too far.

A charismatic young woman meets a dynamic and handsome man at an Orlando nightclub, and it seems like a perfect match, but a secret marriage and a lover who just can't let go spells doom for two innocent victims.

When a young Texas mother goes missing, a tangle of dark secrets and a trail of deceit threatens to derail the investigation.

A look into the beginnings of the Gloriavale community and how it evolved from its socialist Christian beginnings to the extreme place it now occupies.

When a 23-year-old woman goes missing from a shopping mall in Plano, Texas, her family searches for her, and the police seek out who is responsible for her disappearance.

A home invasion turns deadly on Easter night; as Ohio authorities hunt for the assailant, they discover that the attack may not have been as random as first thought.

After a young California father is ambushed on the steps of his own home, Santa Clara detectives uncover a complex murder plot that ultimately leads them to an unexpected mastermind who's been hiding in plain sight all along.

A former marine who once was the hero for a woman in an abusive marriage may have let his desire to help go too far.

A charismatic young woman meets a dynamic and handsome man at an Orlando nightclub, and it seems like a perfect match, but a secret marriage and a lover who just can't let go spells doom for two innocent victims.

When a young Texas mother goes missing, a tangle of dark secrets and a trail of deceit threatens to derail the investigation.

A look into the beginnings of the Gloriavale community and how it evolved from its socialist Christian beginnings to the extreme place it now occupies.

Using technology to solve crime.

An investigation into the disappearance of a devoted father leads Arkansas police to a shocking crime scene, the search for answers reveals gang threats, and a killer that's willing to go to great lengths to escape justice.

A long-time resident of a suburban street descends into a morass of delusion, anger and paranoia that turns him against innocent neighbors; he eventually becomes wholly unhinged and unleashes his violent wrath upon his small Baltimore community.

Using technology to solve crime.

A friendly retired couple delights a family with young children when they move in next door. Then the new neighbors' dog attacks the children's mother, setting off a vicious conflict that ends in two shocking murders.

A long-time resident of a suburban street descends into a morass of delusion, anger and paranoia that turns him against innocent neighbors; he eventually becomes wholly unhinged and unleashes his violent wrath upon his small Baltimore community.

Using technology to solve crime.

When a prominent insurance salesman is gunned down on a country road in Kinston, North Carolina, a 20-year-old secret comes to light and casts a shadow on a killer's flawless reputation.

A friendly retired couple delights a family with young children when they move in next door. Then the new neighbors' dog attacks the children's mother, setting off a vicious conflict that ends in two shocking murders.

Using technology to solve crime.

When a former hockey player discovers his wife murdered in their home, his daughter says she saw a burglar.

When a prominent insurance salesman is gunned down on a country road in Kinston, North Carolina, a 20-year-old secret comes to light and casts a shadow on a killer's flawless reputation.

An investigation into the disappearance of a devoted father leads Arkansas police to a shocking crime scene, the search for answers reveals gang threats, and a killer that's willing to go to great lengths to escape justice.

Mexican drug lord El Chapo evades authorities for over a decade, but one man is determined to catch the kingpin; former DEA agent Andrew Hogan comes out of the shadows to detail his search and capture with never-before-seen videos and photographs.

A jet-setting billionaire finds himself at the center of a murder investigation in Mission Viejo.

When a young paralegal is discovered bound and stabbed to death in his Lakewood Heights home, Atlanta detectives race to find his killer.

Investigating the mysterious story of Jimmy Snuka, whose girlfriend Nancy Argentino died in their motel room in 1983, and revealing her family's 30-year struggle for justice.

When a former hockey player discovers his wife murdered in their home, his daughter says she saw a burglar.

When a prominent insurance salesman is gunned down on a country road in Kinston, North Carolina, a 20-year-old secret comes to light and casts a shadow on a killer's flawless reputation.

An investigation into the disappearance of a devoted father leads Arkansas police to a shocking crime scene, the search for answers reveals gang threats, and a killer that's willing to go to great lengths to escape justice.

Mexican drug lord El Chapo evades authorities for over a decade, but one man is determined to catch the kingpin; former DEA agent Andrew Hogan comes out of the shadows to detail his search and capture with never-before-seen videos and photographs.

A jet-setting billionaire finds himself at the center of a murder investigation in Mission Viejo.

When a young paralegal is discovered bound and stabbed to death in his Lakewood Heights home, Atlanta detectives race to find his killer.

Investigating the mysterious story of Jimmy Snuka, whose girlfriend Nancy Argentino died in their motel room in 1983, and revealing her family's 30-year struggle for justice.

Murder weapons often hold several critical forensic clues about the crime.

When an airman from Lee, Maine vanishes only four months into his marriage to a country girl from West Texas, it triggers a multi-agency investigation that exposes a darker side to southern hospitality.

A five-year relationship between neighbors falls apart when one borrows the other's lawnmower and supposedly returns it broken; camaraderie morphs into rage, threats, and physical violence until a bloody murder devastates the community.

Murder weapons often hold several critical forensic clues about the crime.

A retired couple's golden years shatter when a troubled Army veteran moves in next door and makes their lives hell with his appalling behavior; they declare war, fighting vicious battles until one of these neighbors turns up dead.

A five-year relationship between neighbors falls apart when one borrows the other's lawnmower and supposedly returns it broken; camaraderie morphs into rage, threats, and physical violence until a bloody murder devastates the community.

Murder weapons often hold several critical forensic clues about the crime.

When a small-town preacher is hospitalized with a mysterious illness, North Carolina police uncover a string of suspicious deaths centered around a Burlington woman who has a hidden dark side.

A retired couple's golden years shatter when a troubled Army veteran moves in next door and makes their lives hell with his appalling behavior; they declare war, fighting vicious battles until one of these neighbors turns up dead.

Murder weapons often hold several critical forensic clues about the crime.

Two young teachers, one from New Zealand and the other from Indiana, fall in love on the eve of the 2011 earthquake and tsunami in Japan.

When a small-town preacher is hospitalized with a mysterious illness, North Carolina police uncover a string of suspicious deaths centered around a Burlington woman who has a hidden dark side.

When an airman from Lee, Maine vanishes only four months into his marriage to a country girl from West Texas, it triggers a multi-agency investigation that exposes a darker side to southern hospitality.

Rapper Meek Mill interview; exploring controversies surrounding the criminal justice system, including the parole system, wrongful convictions, challenges faced by law enforcement, alleged police abuse and more.

When a pediatric dentist is found dead, police uncover a complex plot and their suspect leads investigators on an international manhunt; the lead detective speaks out for the first time.

The mysterious death of a young mother in Ohio and the ensuing investigation that spans years and multiple states.

Two young teachers, one from New Zealand and the other from Indiana, fall in love on the eve of the 2011 earthquake and tsunami in Japan.

When a small-town preacher is hospitalized with a mysterious illness, North Carolina police uncover a string of suspicious deaths centered around a Burlington woman who has a hidden dark side.

When an airman from Lee, Maine vanishes only four months into his marriage to a country girl from West Texas, it triggers a multi-agency investigation that exposes a darker side to southern hospitality.

Rapper Meek Mill interview; exploring controversies surrounding the criminal justice system, including the parole system, wrongful convictions, challenges faced by law enforcement, alleged police abuse and more.

When a pediatric dentist is found dead, police uncover a complex plot and their suspect leads investigators on an international manhunt; the lead detective speaks out for the first time.

The mysterious death of a young mother in Ohio and the ensuing investigation that spans years and multiple states.

Killers attempt to use the elements to cover their crimes.

The peaceful life of a retired North Carolina couple is shattered when a husband's body is found in his own garage, leaving investigators to sort out fact from fiction with the help of his wife.

A man returns to his hometown after years away; he receives a warm welcome from the residents until the noise from a new neighbor's puppies turns him into a vengeful menace who goes to war with the entire community.

Killers attempt to use the elements to cover their crimes.

This true-crime series tells the chilling tales of those most unfortunate souls who unwittingly take up residence within a stone's throw of a psycho or killer.

A man returns to his hometown after years away; he receives a warm welcome from the residents until the noise from a new neighbor's puppies turns him into a vengeful menace who goes to war with the entire community.

Killers attempt to use the elements to cover their crimes.

After a bizarre account of suspected false identity is reported, authorities uncover a long history of an evasive criminal and launch a nationwide hunt to catch a killer who uses Southern charm as a weapon of deception.

This true-crime series tells the chilling tales of those most unfortunate souls who unwittingly take up residence within a stone's throw of a psycho or killer.

Killers attempt to use the elements to cover their crimes.

A detective comes face to face with a serial killer when she promises to get justice for the mother of a victim whose body turns up at an Anaheim trash facility.

After a bizarre account of suspected false identity is reported, authorities uncover a long history of an evasive criminal and launch a nationwide hunt to catch a killer who uses Southern charm as a weapon of deception.

The peaceful life of a retired North Carolina couple is shattered when a husband's body is found in his own garage, leaving investigators to sort out fact from fiction with the help of his wife.

A recent law school graduate in Georgia who has a promising future disappears without a trace.

When a pharmacist is found shot dead, investigators go on a 15-year hunt for his killer; for Andrea Canning, this story has unique locations, fascinating potential suspects and riveting plot twists, but says the victim makes this mystery special.

A wealthy couple is brutally attacked on their country estate just outside Atlanta; as detectives scour the property for leads, they discover a dark secret, unbeknownst to the community, that multiplies their suspect list tenfold.

A detective comes face to face with a serial killer when she promises to get justice for the mother of a victim whose body turns up at an Anaheim trash facility.

After a bizarre account of suspected false identity is reported, authorities uncover a long history of an evasive criminal and launch a nationwide hunt to catch a killer who uses Southern charm as a weapon of deception.

The peaceful life of a retired North Carolina couple is shattered when a husband's body is found in his own garage, leaving investigators to sort out fact from fiction with the help of his wife.

A recent law school graduate in Georgia who has a promising future disappears without a trace.

When a pharmacist is found shot dead, investigators go on a 15-year hunt for his killer; for Andrea Canning, this story has unique locations, fascinating potential suspects and riveting plot twists, but says the victim makes this mystery special.

A wealthy couple is brutally attacked on their country estate just outside Atlanta; as detectives scour the property for leads, they discover a dark secret, unbeknownst to the community, that multiplies their suspect list tenfold.

In fall 1991, Toronto was paralyzed by the story of a missing six-year-old girl found raped and murdered in the boiler room of her apartment building; with four suspects, CSIs turned to the brand-new science of DNA to catch the killer.

After a hardworking mother is trapped and killed in a California house fire, investigators sift through multiple theories to figure out who could have ignited the deadly blaze.

A peaceful suburb turns upside down when a family learns that the neighbor has kept a secret wife locked in his home for years; things escalate when the family helps her escape with her baby, leading to a bitter feud that ends in terrible bloodshed.

In fall 1991, Toronto was paralyzed by the story of a missing six-year-old girl found raped and murdered in the boiler room of her apartment building; with four suspects, CSIs turned to the brand-new science of DNA to catch the killer.

After years of a married couple ruling their street, a new neighbor who doesn't abide by them moves in; years of tension fester between the two parties until one is pushed over the edge, resulting in a shocking double-execution.

A peaceful suburb turns upside down when a family learns that the neighbor has kept a secret wife locked in his home for years; things escalate when the family helps her escape with her baby, leading to a bitter feud that ends in terrible bloodshed.

In fall 1991, Toronto was paralyzed by the story of a missing six-year-old girl found raped and murdered in the boiler room of her apartment building; with four suspects, CSIs turned to the brand-new science of DNA to catch the killer.

As Pennsylvania police investigate the gruesome murder of a grandmother in her own home, detectives sort through a web of lies and nefarious activities before ultimately going toe to toe with a cold-blooded killer.

After years of a married couple ruling their street, a new neighbor who doesn't abide by them moves in; years of tension fester between the two parties until one is pushed over the edge, resulting in a shocking double-execution.

In fall 1991, Toronto was paralyzed by the story of a missing six-year-old girl found raped and murdered in the boiler room of her apartment building; with four suspects, CSIs turned to the brand-new science of DNA to catch the killer.

A luxury car salesman is asked by a beautiful former client to plan a murder.

As Pennsylvania police investigate the gruesome murder of a grandmother in her own home, detectives sort through a web of lies and nefarious activities before ultimately going toe to toe with a cold-blooded killer.

After a hardworking mother is trapped and killed in a California house fire, investigators sift through multiple theories to figure out who could have ignited the deadly blaze.

A father in Hawaii tackles setback after setback in his fight for justice for his murdered daughter.

When a Navy man falls victim to a deadly home invasion, the search for his killers exposes both a sordid romance and a deadly conspiracy within his own ranks.

Numerous patients at a Texas dialysis treatment center have gone into cardiac arrest, resulting in five deaths in one month; investigators work with the Centers for Disease Control to expose a chilling connection between the unexplained tragedies.

After a father is found dead in his family's Florida mansion, what at first appears to be suicide turns into a complex murder mystery where a mother's cryptic words and a son's suspicious behavior suggest either could be hiding a deadly grudge.

A luxury car salesman is asked by a beautiful former client to plan a murder.

As Pennsylvania police investigate the gruesome murder of a grandmother in her own home, detectives sort through a web of lies and nefarious activities before ultimately going toe to toe with a cold-blooded killer.

After a hardworking mother is trapped and killed in a California house fire, investigators sift through multiple theories to figure out who could have ignited the deadly blaze.

A father in Hawaii tackles setback after setback in his fight for justice for his murdered daughter.

When a Navy man falls victim to a deadly home invasion, the search for his killers exposes both a sordid romance and a deadly conspiracy within his own ranks.

Numerous patients at a Texas dialysis treatment center have gone into cardiac arrest, resulting in five deaths in one month; investigators work with the Centers for Disease Control to expose a chilling connection between the unexplained tragedies.

After a father is found dead in his family's Florida mansion, what at first appears to be suicide turns into a complex murder mystery where a mother's cryptic words and a son's suspicious behavior suggest either could be hiding a deadly grudge.

As Pennsylvania police investigate the gruesome murder of a grandmother in her own home, detectives sort through a web of lies and nefarious activities before ultimately going toe to toe with a cold-blooded killer.

A family man is gunned down on the side of the road in a small town in Texas, and detectives unearth a perpetrator who's hiding more than one shocking skeleton in the closet.

Small town McNeil, Ark., is grief-stricken after a retired sheriff is suddenly shot to death; when the case appears to be closed, a killer strikes again, and another local hero is struck down.

When a beloved grandfather in Federal Heights, Colo., vanishes without a trace, the ensuing investigation exposes disturbing secrets that were lurking behind closed doors as police body cam footage reveals the deadly truth.

When Leslie Neulander's death is declared accidental, forensic investigators sound the alarm that it was no accident.

A suitcase filled with unidentified human remains unlocks a missing person's case that has gone unsolved for years; the forensic analysis of a nearly-destroyed cellphone found in the suitcase reveals a mysterious selfie.

As Pennsylvania police investigate the gruesome murder of a grandmother in her own home, detectives sort through a web of lies and nefarious activities before ultimately going toe to toe with a cold-blooded killer.

A family man is gunned down on the side of the road in a small town in Texas, and detectives unearth a perpetrator who's hiding more than one shocking skeleton in the closet.

Small town McNeil, Ark., is grief-stricken after a retired sheriff is suddenly shot to death; when the case appears to be closed, a killer strikes again, and another local hero is struck down.

When a beloved grandfather in Federal Heights, Colo., vanishes without a trace, the ensuing investigation exposes disturbing secrets that were lurking behind closed doors as police body cam footage reveals the deadly truth.

When a wealthy Tribeca businesswoman is reported missing by her two sons, the NYPD is in a race against time to find her; in less than 24 hours, detectives piece together a disturbing picture of lies, greed and the ultimate betrayal.

In Williamsburg, a slew of strikingly similar murders sets off alarm bells; as the body count rises and the victims bear the same twisted signature, investigators reach a terrifying conclusion: a serial killer is stalking the streets of Brooklyn.

A violent home invasion in Queens ends with the murder of an NYPD officer's brother; when detectives investigate, they discover there's more to this case than meets the eye, including a secret card game with links to the mob.

When a jeweler is executed in Midtown in broad daylight, detectives uncover the dark underbelly powering Manhattan's Diamond District; zeroing in on the killer, a network of crooks, savagery and silence stands between the NYPD and the truth.

Bereaved over the loss of their son, a couple is thrilled when a family with two boys moves in across the street; however, the relationship soon sours, engulfing all of them in a conflict that ends in a deadly shooting.

Police find 28-year-old Cathy Marlow slumped against the wall of her office bathroom. When they discover her purse and its contents missing, along with six office laptops, detectives suspect it's a burglary gone bad.

Louisiana investigators find Andrew Jasmine in front of his home video game console, riddled with bullet holes. And with shell casings from two different firearms, the crime scene bears the hallmarks of a criminal conspiracy.

When a wealthy Tribeca businesswoman is reported missing by her two sons, the NYPD is in a race against time to find her; in less than 24 hours, detectives piece together a disturbing picture of lies, greed and the ultimate betrayal.

In Williamsburg, a slew of strikingly similar murders sets off alarm bells; as the body count rises and the victims bear the same twisted signature, investigators reach a terrifying conclusion: a serial killer is stalking the streets of Brooklyn.

A violent home invasion in Queens ends with the murder of an NYPD officer's brother; when detectives investigate, they discover there's more to this case than meets the eye, including a secret card game with links to the mob.

When a jeweler is executed in Midtown in broad daylight, detectives uncover the dark underbelly powering Manhattan's Diamond District; zeroing in on the killer, a network of crooks, savagery and silence stands between the NYPD and the truth.

Bereaved over the loss of their son, a couple is thrilled when a family with two boys moves in across the street; however, the relationship soon sours, engulfing all of them in a conflict that ends in a deadly shooting.

Police find 28-year-old Cathy Marlow slumped against the wall of her office bathroom. When they discover her purse and its contents missing, along with six office laptops, detectives suspect it's a burglary gone bad.

Louisiana investigators find Andrew Jasmine in front of his home video game console, riddled with bullet holes. And with shell casings from two different firearms, the crime scene bears the hallmarks of a criminal conspiracy.

Sophie, a young artist, struggles with her perfectionist technique to find the magic within her art.

Sophie, a young artist, struggles with her perfectionist technique to find the magic within her art.

Explosive experts sifting through bomb evidence discover a more insidious plan.

A private school owner is kidnapped.

A car crash on a rural highway leaves one woman dead while her husband walks away unscathed; it appears to be a tragic accident, but one state trooper can't shake the feeling the crash is anything but routine.

Firefighters discover the charred remains of a young wife and mother, but the flames didn't kill her; she sustained a gunshot wound to the head, and the evidence points to her taking her own life; loved ones argue it's a case of murder.

When a wealthy Tribeca businesswoman is reported missing by her two sons, the NYPD is in a race against time to find her; in less than 24 hours, detectives piece together a disturbing picture of lies, greed and the ultimate betrayal.

In Williamsburg, a slew of strikingly similar murders sets off alarm bells; as the body count rises and the victims bear the same twisted signature, investigators reach a terrifying conclusion: a serial killer is stalking the streets of Brooklyn.

A violent home invasion in Queens ends with the murder of an NYPD officer's brother; when detectives investigate, they discover there's more to this case than meets the eye, including a secret card game with links to the mob.

When a jeweler is executed in Midtown in broad daylight, detectives uncover the dark underbelly powering Manhattan's Diamond District; zeroing in on the killer, a network of crooks, savagery and silence stands between the NYPD and the truth.

Seeking to make a fresh start in Las Vegas, a teacher and her son find themselves the targets of harassment and escalating intimidation by the woman who lives next door.

In Vancouver, Wash., a young couple's neighbor violates the strict codes of community conduct in their housing development.

In Oregon, a couple learns their new neighbor has a deadly past, then relations sour, tempers flare and blood is spilled.

Sophie, a young artist, struggles with her perfectionist technique to find the magic within her art.