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When a gunman turns on his family in Utah, police use drones to hunt him down before there's another victim. In South Carolina, cameras capture a deadly street brawl.

Mother-of-two Lindsay Birbeck's body was found in a quiet corner of a graveyard. Her family and ex-partner speak out about this devastating murder.

18-year-old Liam Gray was attacked and stabbed through the heart by one of his friends. His mum and sisters speak out about the tragedy for the first time.

An effort to find Dena's friend Brandi may yield results, and discussions tell of a tense relationship right before Dena's murder. Did a secret endanger her life.

A family recalls the moments leading to Veda Woodson's murder on an empty road. On the Dean case, officers examining Dena's family make a shocking conclusion.

The murder of a teen cheerleader shocks a small suburban town. When there's a similar murder two weeks later, the town suspect a serial killer is at large.

When a football coach vanishes, police investigate a secret betting ring. A chain of clues leads them to one gambler who couldn't pay up.

A family recalls the moments leading to Veda Woodson's murder on an empty road. On the Dean case, officers examining Dena's family make a shocking conclusion.

17-year old Shafelia's disappearance was a mystery - until her sister is arrested for a robbery. Carol Wardell vanished and her husband left tied-up.

Bestselling author, Helen Bailey, was a wealthy widow. After finding love again with Ian Stewart she vanished. He helps in the search - but was it a cover-up.

Days after Jennifer Kesse goes missing, her car is found abandoned near her home. A decade later her disappearance remains one of Florida's most baffling crimes.

Who Killed Angie Lee? A single mother is found beaten and strangled in her own home with her four-year-old son present. The investigation that ensues quickly uproots the community.

Experts analyse a man's deception following the Manchester Arena terror attack. Police tapes expose a man who murdered his wife and hid her body in the freezer.

When arrested for historic sexual offences, TV weatherman Fred Talbot tried to hide the truth in police interviews. His repeated response of 'no comment' speaks volumes.

Brandy leaves work Friday afternoon for a weekend off. But on Monday morning she doesn't show up for work. Did she walk away from her rocky love life.

In rural Missouri, a hunter is found murdered in his car near the popular deer trails. Was this a hunting accident gone wrong, or something more sinister.

When a mother disappears from her home, suspicion moves from one admirer to another. Will a surprise confession solve the mystery.

When LeRyan Nicholson's sisters investigate his disappearance, they uncover a series of secrets that lead them to the heart-breaking truth.

Part 2. Death row inmate John Hummel agrees to a final interview weeks before his execution.

While being questioned on the abduction of a barista, a local businessman makes a deal with police to reveal a secret life as a serial killer.

When a 50-year-old woman is found dead in her home, all that's left behind is a note that reads, 'Chase me.' Police search relentlessly for the remorseless psychopath.

Three locals are found brutally murdered in a quaint village in Maine. The killer leads detectives into the woods, where he buried his fourth victim.

When a father of five is found dead on his kitchen floor, Det. James Colley must untangle a web of twisted relationships and bizarre fantasies to uncover the mystery.

A beloved grandpa is found dead in his van on Halloween. Detectives find they are on the trail of someone who has most likely killed before.

Las Vegas Detectives must solve the murder of a young woman after her body turns up in a concrete and wooden box in the middle of the desert.