In the UK, the dismembered body of a woman leaves a couple, obsessed by serial killers, in the frame. In the US, a hidden camera provides vital evidence to help bring justice to a family.

In the US, a missing 15-year-old girl is found dead by cadaver dogs. In the UK, a mystery needs to be solved to identify a dismembered body in a suitcase.

In the US, a woman's murder in her garage is recorded on camera while police pursue their suspect to the Mexican border. In the UK, a woman is found in her bedroom choked, smothered, and stabbed 54 times after a night out.

In the US, recordings provide vital evidence to solve the death of a man's wife. While in the UK, a feud leads to a house fire that kills four young children and their mother.

In the US, a 5-year-old boy is found dead after going on a trip to Disneyland with his father. In the UK, a parking dispute escalates into a double murder.

In the US, a camera hidden in a bag of chocolates solves a murder in a laundry room. In the UK, a gloating social media post entraps a killer.

In the US, a Thanksgiving party ends in tragedy for a married couple, dismembered in their own home. In the UK, a woman is found dead in the woods after being stalked by a stranger.

In the UK, police investigate the disappearance of a 5-year-old boy from his home overnight. In South Africa, local law enforcements use CCTV to retrace the steps of a local drug gang.

In the US, a sister tracks down her brother's killer by becoming an amateur sleuth. In the UK, CCTV is the main witness to identifying the killer of a mother of four.

In New Zealand, a British backpacker is found dead after a Tinder date. In the UK, a 13-year-old girl is killed in an attempt to cover up an inappropriate relationship.

In the UK, a young woman fails to come home after a mysterious date. Her worried family desperately searches for her, only to discover a devious attempt at a cover-up. In the US, investigators are immediately suspicious when a woman’s remains are found after a house fire.

In the US, a man desperately calls the police for help after he is attacked. Police work to crack the case using security footage and phone tracking. In the UK, a dog lover is found murdered in her rural home.

In the US, four murders in quick succession and a man hunt are in full flow with a dramatic ending. In the UK, a young student is found stabbed to death and left in his shower.

In the US, a businesswoman in a whirlwind romance has her newfound joy cut short when she is found murdered in her lover’s home. In the UK, a man with multiple stab wounds is discovered and someone confesses to murder but when the police check the video footage it all seems like odd behavior.

In the US, a woman goes missing with a large sum of money. Assuming foul play, the police search for her until someone is caught lying on camera. In the UK, the shocking murder of a woman in her own home sparks a manhunt.

In the US, a mysterious man buying yogurt is linked to a missing woman. His arrest leads to the discovery of four other women who have disappeared. Meanwhile, a young student gets into a taxi after a night out and never makes it home.

In Colorado, a dead woman in an abandoned car covered in trash is linked to two brothers who immediately become prime suspects. In Michigan, two black bags full of body parts are found in a shed after a young couple goes missing.

In Florida, a 13-year-old girl is found stabbed over a hundred times. A teenager with a knife obsession comes under suspicion. In Colorado, a woman picked up in a "creepy white van" after a night out is missing.

In the UK, a horse-loving woman is found murdered after being stalked digitally and in person. In the US, a Texas wife is found shot dead outside her home. Her estranged husband threatened to kill her after she bailed 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; his vlogs reveal the truth.

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.

Pregnant Summer Tatum was shot twice in the head by her husband after she discovered his online affair. Andreen McDonald, a businesswoman, was killed by her husband, Andre, with a hammer.

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 mother is fatally shot while sitting inside her parked car. A Vietnam veteran is shot by his own son, who claims self-defense.

The last known interaction of Martika Ferguson is captured on camera and leads police to a suspect who closely resembles the person seen in the CCTV footage. In Alabama, a shocking investigation unfolds in the death of Tiffiney Crawford.

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

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