When a Colorado mother vanishes, the detective investigating her disappearance discovers a connection to a previous assault; the survivor of that attack recounts her terrifying ordeal.

After an apparent brazen home invasion during the holiday season in a Connecticut community leaves Connie Dabate dead, investigators discover a silent witness that cracks the case wide open.

It's a true Hollywood whodunit; a show business stuntman is shot four times and left to die; investigators uncover a love story gone wrong and a villain with a dark secret; the most stunning twist of all is what didn't happen.

An advocate for missing and murdered Indigenous women searches for answers in the disappearance of her niece and exposes cracks in law enforcement; Andrea Canning looks back on this important story, one that became her passion project.

After an apparent brazen home invasion during the holiday season in a Connecticut community leaves Connie Dabate dead, investigators discover a silent witness that cracks the case wide open.

When a Colorado mother vanishes, the detective investigating her disappearance discovers a connection to a previous assault; the survivor of that attack recounts her terrifying ordeal.

The holiday season screeches to a halt when six members of the Anderson family are discovered to have been gunned down in their home; detectives work closely with family friends to track down the shocking murderer.

It all began when a best selling author found his wife at the base of the stairs; the story makes headlines and has been covered for more than a decade; Michael Peterson answers questions.

The Ortega family's annual Christmas Eve party is destroyed when a man dressed as Santa, wielding handguns and a homemade flame-thrower opens fire; detectives are led down a terrifying path that leads them to a sociopath.

Motivational speaker Rebecca Musser talks about her life in The Fundamentalist Church of Jesus Christ of Latter-day Saints and what made her leave the denomination.

Motivational speaker Rebecca Musser talks about her life in The Fundamentalist Church of Jesus Christ of Latter-day Saints and what made her leave the denomination.

When a college student is found dead after a party, his mother gets the help of a new friend to get the case in front of a jury.

Prosecutor Kelly Siegler uses controversial tactics to demonstrate to a jury how a suburban mom could have planned, tortured, killed and buried her husband, Jeffrey Wright, in their backyard.

Popular high school senior Chris Daigle mysteriously disappears from Missouri City, Texas; for nearly a decade, his mother will stop at nothing to get answers while keeping friends close but enemies closer.

A young man enters a wig shop, stabs three people and flees; a worldwide manhunt finally catches up with the killer and brings him to trial where he and his famed defense attorney face prosecutor Kelly Siegler.

When Melissa Henderson is found dead in her bed, a perplexing mystery ensues; her husband and family believe her death is from natural causes, but the clues lead investigators to a secret life of spying and jealousy and ultimately to a killer.

The search for a missing student yields no returns until a shocking discovery; in her last year at the district attorney's office, Kelly mediates between Tynesha's family, a civil rights activist and law enforcement to help keep the case on track.

Jack Rains, an 83-year-old veteran and retired State Trooper, is gunned down at his kitchen table, shot five times in the back of the head; his family and the community are stunned as detectives uncover a tangled web of secrets, misdeeds and deceit.

Amy Robinson, a teenager with Turner's syndrome, takes her first steps toward independence by getting a job at her local grocery store; her new endeavor ends in tragedy when she befriends a co-worker with a secret past.

Popular teacher and single mom, Bianca Tanner, is embarking on a new chapter in her life with multiple admirers, when she suddenly vanishes; to uncover her fate, detectives investigate each suitor to determine who is genuine and who is a killer.

After the bloody slaying of two men in rural South Carolina, a witness comes forward with information implicating her own family, leaving police to uncover if blood really is thicker than water.

When a prominent Florida optometrist is bludgeoned to death in his home, Melbourne police must investigate claims of self-defense; the evidence trail leads them to a young witness who reveals a wicked murder plot.

When a father is found shot to death in his country home, the family immediately accuses the victim's on-again/off-again ex-spouse; however, evidence soon suggests there might be more players to blame than simply a woman scorned.

After a welfare check is called in on a 53-year-old Texas man, police soon discover him shot to death in a Louisiana swamp that's 450 miles from his home; detectives devise a sting operation to track down his killer and reveal a vengeful murder plot.

When human remains are discovered by road workers in West Virginia, a decades-old missing person's case is reopened and investigators are left to unravel an extensive history of scams and violence, leading them to a malicious con-woman.

Nathan and Denise Leuthold build their family on faith, but suddenly one of them dies and the other is under suspicion; it's a story that stays with Andrea Canning, both because of what happened and when it happened: Valentine's Day.

A family demands answers when the body of an Arizona woman is discovered in a remote area of Texas; evidence left behind leads investigators to unravel a web of deceit until a shocking confession reveals the true mastermind.

When Texas authorities learn of a murder-for-hire plot against an acclaimed boxer, they must devise an undercover sting operation and race against the clock to save his life and expose the remorseless mastermind.

When a novelist's wife is found dead at the bottom of the stairs, investigators wonder if it is an accident or murder; Dennis Murphy interviews main suspect Michael Peterson and returns to the case with insight only he can share.

After a demolition derby driver is found gunned down in his California auto shop, police uncover a dangerous love match that leads one woman to commit the ultimate crime.

After responding to a frantic 911 call from a care-facility nurse who has discovered her patient with severe stab wounds and clinging to life, police receive an unexpected tip that reveals a group of killers inspired by greed.

The parents of Kristin Smart speak out in an interview following the sentencing of their daughter's killer.

When a beloved father and driven entrepreneur is fatally shot at a busy California intersection, authorities discover a recent business venture that led one partnership to turn deadly.

After the body of a young San Antonio man is found dumped in a local cemetery, investigators retrace the victim's steps to untangle a web of deceit that begins with a heartless woman.

After an apparent brazen home invasion during the holiday season in a Connecticut community leaves Connie Dabate dead, investigators discover a silent witness that cracks the case wide open.

Coastal Texas is thrown into shock when a beloved retiree is found executed in his home; an unlikely witness comes forward and leads investigators to uncover a malicious murder plot.

Rumors spread through a small town in Indiana after a well-known resident is found dead in his home after hosting a party; authorities investigate accusations from the partygoers to expose how a toxic love triangle turned deadly.

An advocate for missing and murdered Indigenous women searches for answers in the disappearance of her niece and exposes cracks in law enforcement; Andrea Canning looks back on this important story, one that became her passion project.

When an Iowa mother and her newborn son are reported missing, police race against time to rescue the pair and stop a maniacal woman from enacting a dangerous plan.

After an apparent brazen home invasion during the holiday season in a Connecticut community leaves Connie Dabate dead, investigators discover a silent witness that cracks the case wide open.

When a loving father is shot to death in front of his home by a masked gunman on Halloween night, Los Angeles Police must follow the evidence to determine whether this was a case of holiday hijinks gone awry or something far more sinister.

The holiday season screeches to a halt when six members of the Anderson family are discovered to have been gunned down in their home; detectives work closely with family friends to track down the shocking murderer.

The Ortega family's annual Christmas Eve party is destroyed when a man dressed as Santa, wielding handguns and a homemade flame-thrower opens fire; detectives are led down a terrifying path that leads them to a sociopath.

Brittany Stork's decades-long quest to find out more about her mother's mysterious death leads to a dramatic courtroom decision; the man at the center of the case tells his side of the story.

Brittany Stork's decades-long quest to find out more about her mother's mysterious death leads to a dramatic courtroom decision; the man at the center of the case tells his side of the story.

When a wife calls 911 to report her husband has been shot on a country road in Texas, officers rush to the scene.

Popular high school senior Chris Daigle mysteriously disappears from Missouri City, Texas; for nearly a decade, his mother will stop at nothing to get answers while keeping friends close but enemies closer.

A man uses a dating site to meet and murder a college student.

When Melissa Henderson is found dead in her bed, a perplexing mystery ensues; her husband and family believe her death is from natural causes, but the clues lead investigators to a secret life of spying and jealousy and ultimately to a killer.

When a South Carolina coroner arrives at the scene of a car accident to find his friend deceased, he notices some unusual markings on her face and begins to think her death looks suspicious.

Jack Rains, an 83-year-old veteran and retired State Trooper, is gunned down at his kitchen table, shot five times in the back of the head; his family and the community are stunned as detectives uncover a tangled web of secrets, misdeeds and deceit.

When a Colorado mother vanishes, the detective investigating her disappearance discovers a connection to a previous assault; the survivor of that attack recounts her terrifying ordeal.

Popular teacher and single mom, Bianca Tanner, is embarking on a new chapter in her life with multiple admirers, when she suddenly vanishes; to uncover her fate, detectives investigate each suitor to determine who is genuine and who is a killer.

After an apparent brazen home invasion during the holiday season in a Connecticut community leaves Connie Dabate dead, investigators discover a silent witness that cracks the case wide open.

When a local EMT dies in a suspicious house fire in Mississippi, investigators work for two years to expose the mastermind behind her death and uncover a greedy scheme from an unlikely source.

When a renowned Missouri snake breeder is discovered in a pool of blood, investigators believe his death was caused by one of his snakes; however, shocking evidence is found on scene, launching a homicide investigation that unveils a sinister plot.

After three Atlanta men are gunned down in the span of three days, detectives connect the murders to two exotic dancers; knowing only their stage names, investigators race to find the women and uncover the motive behind this devastating crime spree.

A young mother in Utah vanishes and the only suspect, her husband, acts suspiciously; Stephanie Bauer examines never-before-seen home video recordings that shed light on the dramatic events surrounding the disappearance of Susan Cox Powell.

After skeletal remains are uncovered at a makeshift dumpsite in Fort Sumner, N.M., investigators are left to untangle a complicated family history that reveals the callous truth behind what happened.

When human remains are discovered by road workers in West Virginia, a decades-old missing person's case is reopened and investigators are left to unravel an extensive history of scams and violence, leading them to a malicious con-woman.

A defensive husband flees justice after the disappearance of his wife drags both of their families down deeper into destruction and tragedy.

A family demands answers when the body of an Arizona woman is discovered in a remote area of Texas; evidence left behind leads investigators to unravel a web of deceit until a shocking confession reveals the true mastermind.

When Texas authorities learn of a murder-for-hire plot against an acclaimed boxer, they must devise an undercover sting operation and race against the clock to save his life and expose the remorseless mastermind.

A once prominent heart surgeon is found dead in his bed after suffering mysterious health conditions.

After a demolition derby driver is found gunned down in his California auto shop, police uncover a dangerous love match that leads one woman to commit the ultimate crime.

A scenic drive up the coast of California turns deadly when a young woman falls from an overlook in Big Sur, but when the people closest to her hear about the tragic accident, they are convinced that something more nefarious is going on.

After responding to a frantic 911 call from a care-facility nurse who has discovered her patient with severe stab wounds and clinging to life, police receive an unexpected tip that reveals a group of killers inspired by greed.

Investigators focus on her husband as the main suspect when a woman is found dead at the bottom of her staircase, but family and friends rally behind him.

When a beloved father and driven entrepreneur is fatally shot at a busy California intersection, authorities discover a recent business venture that led one partnership to turn deadly.

Mountain of Secrets; Special episode of "Cold Justice" featuring insights from Kelly Siegler and behind-the-scenes facts.

After the body of a young San Antonio man is found dumped in a local cemetery, investigators retrace the victim's steps to untangle a web of deceit that begins with a heartless woman.

When a Navy officer succumbs to a mysterious illness after months at sea, nothing makes sense, until an autopsy yields a stunning revelation; all roads lead to dead ends, until they zero in on an unlikely target.

Coastal Texas is thrown into shock when a beloved retiree is found executed in his home; an unlikely witness comes forward and leads investigators to uncover a malicious murder plot.

When a successful family man is discovered in the rubble of a deadly explosion, investigators desperately try to determine if it was a planned hit, an attempted terrorist attack, or something else...

Mountain of Secrets; Special episode of "Cold Justice" featuring insights from Kelly Siegler and behind-the-scenes facts.

Rumors spread through a small town in Indiana after a well-known resident is found dead in his home after hosting a party; authorities investigate accusations from the partygoers to expose how a toxic love triangle turned deadly.

When a Navy officer succumbs to a mysterious illness after months at sea, nothing makes sense, until an autopsy yields a stunning revelation; all roads lead to dead ends, until they zero in on an unlikely target.

When an Iowa mother and her newborn son are reported missing, police race against time to rescue the pair and stop a maniacal woman from enacting a dangerous plan.

When a successful family man is discovered in the rubble of a deadly explosion, investigators desperately try to determine if it was a planned hit, an attempted terrorist attack, or something else...

When a loving father is shot to death in front of his home by a masked gunman on Halloween night, Los Angeles Police must follow the evidence to determine whether this was a case of holiday hijinks gone awry or something far more sinister.

A holiday is ruined when a couple is gunned down in their bed during what looks like a brutal home invasion, but police soon discover the true motive for the double homicide is a shocking tale of deception and betrayal.

Firefighters respond to a house fire and discover three gunshot victims inside; authorities pursue the heavily armed murderer through Christmas.

A teen's murder shakes a Nevada community, especially when two unlikely people make confessions.

A teen's murder shakes a Nevada community, especially when two unlikely people make confessions.

Recently uncovered pages from John Hinckley Jr.'s diary, which he began writing after he was arrested for trying to assassinate President Ronald Reagan; an interview with the officer who questioned Hinckley after the attempted assassination.

A man uses a dating site to meet and murder a college student.

When a South Carolina coroner arrives at the scene of a car accident to find his friend deceased, he notices some unusual markings on her face and begins to think her death looks suspicious.

When a Colorado mother vanishes, the detective investigating her disappearance discovers a connection to a previous assault; the survivor of that attack recounts her terrifying ordeal.

When 19-year-old Jessica Chambers is set on fire inside her car and burned to death, the question of who did it quickly becomes a nationwide obsession all while wreaking havoc on a small Mississippi town.

After an apparent brazen home invasion during the holiday season in a Connecticut community leaves Connie Dabate dead, investigators discover a silent witness that cracks the case wide open.

Halloween turns into a real-life horror movie when a single mother is gunned down on her way home from trick-or-treating by a costumed killer in Florida; detectives uncover an unexpected witness that helps reveal the monster behind the mask.

When two men disappear in the quiet community of Clemmons, N.C., rumors swirl about a devil-worshipping couple and their house of horrors; an investigation leads police to discover there may be more than secrets buried in the backyard.

A young mother in Utah vanishes and the only suspect, her husband, acts suspiciously; Stephanie Bauer examines never-before-seen home video recordings that shed light on the dramatic events surrounding the disappearance of Susan Cox Powell.

When a beloved woman goes missing in Everett, Wash., police find that her apartment was the scene of a violent attack; unable to find her, investigators are led to a coven of modern-day wiccans and one witness who reveals the horrifying truth.

When two young women are brutally murdered in Phoenix, friends and family wait decades for answers; when advancements in DNA reinvigorate the case, police discover the killer has been hiding in plain sight.

A defensive husband flees justice after the disappearance of his wife drags both of their families down deeper into destruction and tragedy.

Analyzing the investigation into the gruesome murder of an esteemed Southern doctor; an anonymous tip leads police to uncover a pattern of lust, greed and a complex dynamic between twin sisters.

Updates to an episode with new details and interviews; the son of a wealthy psychologist finds his father murdered and points the finger at his mother; investigators delve into the marriage, revealing darkness hidden behind a facade.

A once prominent heart surgeon is found dead in his bed after suffering mysterious health conditions.

Eighteen years into her prison sentence, Coty Martinez opens up about the multistate killing spree that landed her behind bars; claiming to have been a victim herself, she attempts to explain how she ended up on a dark path.

A scenic drive up the coast of California turns deadly when a young woman falls from an overlook in Big Sur, but when the people closest to her hear about the tragic accident, they are convinced that something more nefarious is going on.

In her first televised interview, Angelina O'Mara attempts to explain the back-to-back 2011 murders of her ex-husband and boyfriend; she describes her state of mind at the time and discusses whether she deserves redemption from those she hurt most.

Investigators focus on her husband as the main suspect when a woman is found dead at the bottom of her staircase, but family and friends rally behind him.

Speaking on camera for the first time, Cameo Clines revisits the deadly Texas crime spree born from a toxic romance; from behind bars, he offers a rare look into the events that led to two murders and shares his hopes for redemption.

Mountain of Secrets; Special episode of "Cold Justice" featuring insights from Kelly Siegler and behind-the-scenes facts.

A newly single mother of two vanishes after going on a date with an old high school friend she connected with on Facebook; investigators race against the clock to reveal the true identity of the mystery man.

When a Navy officer succumbs to a mysterious illness after months at sea, nothing makes sense, until an autopsy yields a stunning revelation; all roads lead to dead ends, until they zero in on an unlikely target.

A California Granny is thought of as a Mother Teresa to the downtrodden thanks to the boarding house she runs; but when a social worker raises fears for a missing client, investigators find that Granny's carefully tended garden hides horrors.

When a successful family man is discovered in the rubble of a deadly explosion, investigators desperately try to determine if it was a planned hit, an attempted terrorist attack, or something else...

Speaking on camera for the first time, Cameo Clines revisits the deadly Texas crime spree born from a toxic romance; from behind bars, he offers a rare look into the events that led to two murders and shares his hopes for redemption.

Mountain of Secrets; Special episode of "Cold Justice" featuring insights from Kelly Siegler and behind-the-scenes facts.

A newly single mother of two vanishes after going on a date with an old high school friend she connected with on Facebook; investigators race against the clock to reveal the true identity of the mystery man.

When a Navy officer succumbs to a mysterious illness after months at sea, nothing makes sense, until an autopsy yields a stunning revelation; all roads lead to dead ends, until they zero in on an unlikely target.

A California Granny is thought of as a Mother Teresa to the downtrodden thanks to the boarding house she runs; but when a social worker raises fears for a missing client, investigators find that Granny's carefully tended garden hides horrors.

When a successful family man is discovered in the rubble of a deadly explosion, investigators desperately try to determine if it was a planned hit, an attempted terrorist attack, or something else...

On Christmas Eve in a quiet town, elderly couple Bob and Idella Young are brutally slain at home; a bloody glove found at the crime scene has the killer's DNA, but no one matches the sample.

Missouri police are called to the home of a prominent judge's daughter to find her husband dead on the couch; while the crime scene suggests a break-in, investigators uncover evidence of a scandalous murder plot driven by greed.

Two days after Christmas a mass shooting terrorizes a small town; after killing two people and wounding many more the gunman is taken into custody; when police search for answers they uncover the worst family massacre in US history.

When a beloved Florida mother is found brutally shot to death and her newborn missing, investigators race against the clock to track down a mysterious visitor whose motives prove sinister.

The latest in the case of a missing young Oregon woman whose disappearance led to an intense manhunt after a suspect embarked on a two-state crime spree.

The latest in the case of a missing young Oregon woman whose disappearance led to an intense manhunt after a suspect embarked on a two-state crime spree.

Key players in the case of Rod Covlin, a New York man who is found guilty of murdering his wife for her $5.3 million fortune and attempting to frame his then-teenage daughter, share their stories.

Serenity in the Montana mountains is shattered when a man is shot to death on his neighbor's land; detectives learn of an escalating dispute over trail access and reenact the shooting to discover if claims of self-defense match the evidence.

Two Tulsa brothers fight for more than 20 years to prove their innocence after they were wrongfully convicted for separate murders.

A feud between neighbors in the quiet suburb of New Brighton, Minn., turns deadly when one man's passion for local wildlife drives his neighbor to snap; investigators must determine whether the shooter acted out of self-defense or bitter revenge.

Lester Holt spends two nights locked up and embedded inside the largest maximum security prison in America, the notorious Louisiana State Penitentiary, also known as Angola.

When an eight-year feud between neighbors in Santa Clarita, Calif., ends in a violent confrontation that leaves one man dead, detectives investigate if the shooting was a tragic case of mistaken identity or a calculated murder plot.

When 19-year-old Jessica Chambers is set on fire inside her car and burned to death, the question of who did it quickly becomes a nationwide obsession all while wreaking havoc on a small Mississippi town.

A beloved pastor is fatally shot in his sleep by a mysterious intruder; investigators uncover a scandalous lifestyle and sordid family secrets that send shock waves through a small Oklahoma community.

Halloween turns into a real-life horror movie when a single mother is gunned down on her way home from trick-or-treating by a costumed killer in Florida; detectives uncover an unexpected witness that helps reveal the monster behind the mask.

When two men disappear in the quiet community of Clemmons, N.C., rumors swirl about a devil-worshipping couple and their house of horrors; an investigation leads police to discover there may be more than secrets buried in the backyard.

When a beloved woman goes missing in Everett, Wash., police find that her apartment was the scene of a violent attack; unable to find her, investigators are led to a coven of modern-day wiccans and one witness who reveals the horrifying truth.

When two young women are brutally murdered in Phoenix, friends and family wait decades for answers; when advancements in DNA reinvigorate the case, police discover the killer has been hiding in plain sight.

Analyzing the investigation into the gruesome murder of an esteemed Southern doctor; an anonymous tip leads police to uncover a pattern of lust, greed and a complex dynamic between twin sisters.

Updates to an episode with new details and interviews; the son of a wealthy psychologist finds his father murdered and points the finger at his mother; investigators delve into the marriage, revealing darkness hidden behind a facade.

A hardworking family man is shot to death in front of his wife during a morning walk with their dog; as police determine if the attack was random or targeted, they uncover a web of deceit spanning across state lines.

Eighteen years into her prison sentence, Coty Martinez opens up about the multistate killing spree that landed her behind bars; claiming to have been a victim herself, she attempts to explain how she ended up on a dark path.

20 years in the making, this special reexamines the Internet's first murder trial, revealing a twisted seductress with a skill for manipulation; after time in prison, she has a second chance at life and love with a stunning final update in her case.

In her first televised interview, Angelina O'Mara attempts to explain the back-to-back 2011 murders of her ex-husband and boyfriend; she describes her state of mind at the time and discusses whether she deserves redemption from those she hurt most.

Speaking on camera for the first time, Cameo Clines revisits the deadly Texas crime spree born from a toxic romance; from behind bars, he offers a rare look into the events that led to two murders and shares his hopes for redemption.

A newly single mother of two vanishes after going on a date with an old high school friend she connected with on Facebook; investigators race against the clock to reveal the true identity of the mystery man.

Speaking on camera for the first time, Cameo Clines revisits the deadly Texas crime spree born from a toxic romance; from behind bars, he offers a rare look into the events that led to two murders and shares his hopes for redemption.

A California Granny is thought of as a Mother Teresa to the downtrodden thanks to the boarding house she runs; but when a social worker raises fears for a missing client, investigators find that Granny's carefully tended garden hides horrors.

When a young Missouri couple is found shot to death on their front porch, the victims' past quickly reveals several suspects close to home; investigators press for a confession from one of the co-conspirators to expose a master manipulator.

Speaking on camera for the first time, Cameo Clines revisits the deadly Texas crime spree born from a toxic romance; from behind bars, he offers a rare look into the events that led to two murders and shares his hopes for redemption.

Decades pass before investigators utilize advancing technology to reveal the clown killer who shot a mother in Florida.

A newly single mother of two vanishes after going on a date with an old high school friend she connected with on Facebook; investigators race against the clock to reveal the true identity of the mystery man.

At a VA hospital in West Virginia, a string of severe hypoglycemic events results in the deaths of several patients; after an investigation ensues, a pattern reveals the work of a serial killer lurking within the halls of the hospital.

A California Granny is thought of as a Mother Teresa to the downtrodden thanks to the boarding house she runs; but when a social worker raises fears for a missing client, investigators find that Granny's carefully tended garden hides horrors.

A local Washington man's life is at stake when detectives are alerted to a murder for hire plot against him; they set up a sting operation to catch the ruthless mastermind before it's too late.

When a Navy officer succumbs to a mysterious illness after months at sea, nothing makes sense, until an autopsy yields a stunning revelation; all roads lead to dead ends, until they zero in on an unlikely target.

After a member of the Indiana cycling community is found mysteriously murdered, medical examiners discover the victim ingested potentially lethal amounts of poisonous mushrooms; Police must work to uncover the culprit behind this bizarre crime.

Missouri police are called to the home of a prominent judge's daughter to find her husband dead on the couch; while the crime scene suggests a break-in, investigators uncover evidence of a scandalous murder plot driven by greed.

A California Granny is thought of as a Mother Teresa to the downtrodden thanks to the boarding house she runs; but when a social worker raises fears for a missing client, investigators find that Granny's carefully tended garden hides horrors.

When a beloved Florida mother is found brutally shot to death and her newborn missing, investigators race against the clock to track down a mysterious visitor whose motives prove sinister.

A newly single mother of two vanishes after going on a date with an old high school friend she connected with on Facebook; investigators race against the clock to reveal the true identity of the mystery man.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out that may hold the answer to her disappearance.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out that may hold the answer to her disappearance.

Oscar Pistorius shoots and kills his girlfriend just eight months after competing in the London Olympics, telling police that he believed she was an intruder and he was acting in self-defense.

Serenity in the Montana mountains is shattered when a man is shot to death on his neighbor's land; detectives learn of an escalating dispute over trail access and reenact the shooting to discover if claims of self-defense match the evidence.

A feud between neighbors in the quiet suburb of New Brighton, Minn., turns deadly when one man's passion for local wildlife drives his neighbor to snap; investigators must determine whether the shooter acted out of self-defense or bitter revenge.

When an eight-year feud between neighbors in Santa Clarita, Calif., ends in a violent confrontation that leaves one man dead, detectives investigate if the shooting was a tragic case of mistaken identity or a calculated murder plot.

A beloved pastor is fatally shot in his sleep by a mysterious intruder; investigators uncover a scandalous lifestyle and sordid family secrets that send shock waves through a small Oklahoma community.

When a young mother goes missing in rural Ohio, it's a race against time to uncover the truth behind her disappearance; as evidence begins pointing to foul play, investigators fear she may have been the victim of a toxic family dynamic.

After a hardworking family man is gunned down in his driveway, a domestic dispute leads investigators to an unlikely culprit and unravels a history of violence, lies and betrayal.

A loving father and husband of an aspiring gospel singer is found shot to death in the passenger seat of his car; when investigators discover a previous attempt on his life, they expose a group of killers driven by greed.

When an Indiana collector of race car memorabilia is found shot in broad daylight with no eyewitnesses, detectives follow the evidence to reveal the true mastermind behind this twisted murder plot.

When an officer discovers a man dumping bags of more than 60 body parts into the Passaic River in East Rutherford, N.J., investigators work to identify the victim and corroborate the chilling story of a confessed killer.

A 15-year-old missing persons case is reinstated when an anonymous tipster leads police to unearth a grisly murder; as witnesses come forward, North Carolina investigators must try to piece together the crime and bring the killer to justice.

A hardworking family man is shot to death in front of his wife during a morning walk with their dog; as police determine if the attack was random or targeted, they uncover a web of deceit spanning across state lines.

20 years in the making, this special reexamines the Internet's first murder trial, revealing a twisted seductress with a skill for manipulation; after time in prison, she has a second chance at life and love with a stunning final update in her case.

Speaking on camera for the first time, Cameo Clines revisits the deadly Texas crime spree born from a toxic romance; from behind bars, he offers a rare look into the events that led to two murders and shares his hopes for redemption.

When a young Missouri couple is found shot to death on their front porch, the victims' past quickly reveals several suspects close to home; investigators press for a confession from one of the co-conspirators to expose a master manipulator.

Decades pass before investigators utilize advancing technology to reveal the clown killer who shot a mother in Florida.

At a VA hospital in West Virginia, a string of severe hypoglycemic events results in the deaths of several patients; after an investigation ensues, a pattern reveals the work of a serial killer lurking within the halls of the hospital.

A local Washington man's life is at stake when detectives are alerted to a murder for hire plot against him; they set up a sting operation to catch the ruthless mastermind before it's too late.

After a member of the Indiana cycling community is found mysteriously murdered, medical examiners discover the victim ingested potentially lethal amounts of poisonous mushrooms; Police must work to uncover the culprit behind this bizarre crime.

A California Granny is thought of as a Mother Teresa to the downtrodden thanks to the boarding house she runs; but when a social worker raises fears for a missing client, investigators find that Granny's carefully tended garden hides horrors.

A newly single mother of two vanishes after going on a date with an old high school friend she connected with on Facebook; investigators race against the clock to reveal the true identity of the mystery man.

A nurse is gunned down in her home and detectives believe they have a clear suspect; as they delve deeper into the investigation new information leads them down a completely different path.

A man calls 911 to report that his pregnant wife has died by suicide; the case is closed until a suspicious house fire 24 years later leads police to question what really happened that day.

When police are unable to identify a young murder victim, a dogged investigator employs the help of armchair detectives and new DNA technology to find her killer -- and her identity.