In Florida, USA, a woman goes missing with a large sum of money. Assuming foul play, the police are running out of time to find her, until someone is caught lying on camera. In the UK, the shocking murder of a woman in her own home sparks outrage.

In the US, a man and his accomplice go on a killing spree, leaving four dead in their wake. The police desperately search for the pair to put an end to their reign of terror. In the UK, a young student is found stabbed to death in his college room.

Two cases of domestic abuse: Patricia Birmingham in the US and Marta Chmielecka in the UK, both killed by their partners, reveal the deadly consequences of toxic relationships.

Kira Steger's murder by her husband and Whitney Gray's fatal road rage shooting reveal the devastating toll of violence both in relationships and on the open road.

A couple are found dismembered in their own home; a woman is found dead after being stalked by a stranger.

In the United States, a five-year-old boy is found dead after going on a trip to Disneyland with his father, and in the United Kingdom, a parking dispute escalates into a double murder.

In the United States, a missing 15-year-old is found by cadaver dogs. In the United Kingdom, a mystery needs to be solved in order to identify a dismembered body found in a suitcase.

A camera hidden in a bag of chocolates solves a murder; a gloating social media post entraps a killer.

A young woman disappears after meeting up with an old flame; in the UK, a dating app-related murder unfolds.

The murders of Martika Ferguson and Tiffiney Crawford expose the deadly toll of disproportionate revenge.

Shocking footage of real crimes. In the UK, the dismembered body of a woman leaves a gay couple, obsessed by serial killers, in the frame

A horse-loving woman is stalked digitally and in person, but her cry for help is ignored, with lethal consequences. An estranged husband threatens to kill his wife after she helps him out of jail.

In Texas, a husband "fails" to stop his wife from taking her own life with a gunshot to the back of her head. Home surveillance reveals the truth. In Washington state, a man builds a bunker in secret with a diabolical plan for his wife and daughter.

A woman is shot in her car by her estranged husband in front of her daughter. In the US, a Vietnam veteran is shot at home by his son over a will dispute.

An abandoned car is found with four bodies inside; in the UK, a woman is murdered by her stalker.

The murder of a couple is caught on camera; in the UK, a long-standing feud turns fatal.

A young UK student is raped and murdered. Surveillance footage traps a serial sex offender. A jazz musician and his new girlfriend are murdered a week apart by her jealous ex.

A spree killer is on the loose in New Mexico; in Colorado, a mother is found dead inside an isolated cabin.