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.

Surveillance footage plays a central role in tracking down the killers in two murder cases.

A 9-1-1 call captures the final moments of Collin Turner; CCTV helps reveal Mary Kay Wohlfarth's killer.

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.

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.

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.

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 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.

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.

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

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.

When an armed and dangerous spree killer is on the loose in New Mexico, no one is safe until a high-speed chase ensues. In Colorado, the murder of a young mother stumps police until traditional police work and CCTV footage intertwines.

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.

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.

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.

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.

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.