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 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, 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 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 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.

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.

Surveillance cameras capture the last known footage of Kira Steger as she leaves the Mall of America with her husband. In Missouri, a young mother falls victim to a fatal road rage incident.

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 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 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.

Patricia Birmingham captures the harrowing final seconds of her life on her cellphone, revealing a web of forensic evidence against her husband. In the UK, police retrace the last steps of wife Marta Chmielecka with CCTV footage.

CCTV and GPS find the killer of Jasmine Pace; digital forensics reveals Megan Newton's killer.

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.

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

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.

Cameras capture a calculated poisoning plot; a routine stop uncovers another killer.

Footprints unravel lies in one case; CCTV retraces the final moments of a victim.

A killer records himself tampering with the weapon; phone data exposes betrayal.

A double murder case ends in a confession; CCTV exposes a jealous former partner.

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.

Surveillance footage plays a crucial role in revealing the truth after a man claims he shot his pregnant wife Summer Tatum in self-defense. In Texas, successful businesswoman Andreen McDonald is killed with a hammer, and signs point to her husband.

When a UK college student disappears, police uncover the trail of a serial sex offender and fear the worst. In the US, the double homicide of a jazz musician and his new girlfriend leaves a trail of digital evidence that points to a jealous ex-boyfriend.