The hunt for 18-year-old Kelsey Smith, who disappeared from a Kansas Mall in June 2007. The only clue detectives had was the haunting final images of her on surveillance video. The case turned into a murder investigation when Kelsey's body was recovered from a lake in Missouri a month later.

A newly engaged couple is found brutally murdered in their car parked in a deserted parking lot. To investigators it looks like an execution. There are no leads until a surveillance camera 90 miles away gives the investigation its first break - a killer bent on revenge. It's a race against time.

In Pensacola, FL, police investigate the strange disappearance popular news reporter Sean Dugas, and find themselves drawn into an addictive world of gaming. Across the state, a mom vanishes after a family party. Detectives have no leads until a neighbor's CCTV reveals a shocking tale of murder and betrayal.

A husband and respected businessman vanishes after a meeting. Meanwhile, a young mother doesn't come back from her job search. Cops can only rely on one witness-one that never lies-surveillance cameras.

In Pensacola, FL, two loving parents are brutally gunned down in their own home. Police must rely on surveillance cameras to catch the suspected killers and bring them to justice.

Every parent's worst nightmare comes true when 16-year-old Skylar Neese disappears without a trace from her West Virginia home. But a few seconds of surveillance footage leads cops to the most shocking discovery imaginable.