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.

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.

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.

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.

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.

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 vehicle is discovered with the bodies of four victims inside. With no clear motive, only hidden cameras can expose the killer. In the UK, Alice Ruggles is found murdered, and suspicion lands on her stalker ex-boyfriend.

CCTV footage captures the murder of a couple and reveals that the perpetrator remains at the crime scene for an extended time following his brazen act. In the UK, a long-standing feud turns fatal.

The death of Mo Wilson sparks an investigation that can only be solved through cameras. When a suspect comes to light, an international manhunt ensues. In the UK, a popular dating app is used to lure a victim to his tragic death.

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.