18-year-old Kelsey Smith disappears from an Overland Park, KS mall in 2007. The only clue for detectives is the haunting final images of her on surveillance video. Somewhere in these frames hides the answer -- and a killer.

A newly engaged couple is found brutally murdered in their car parked in a deserted parking lot in Irvine, CA. 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.

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

Doug Coker, husband and respected businessman, vanishes after a meeting in Henry County, GA, in 2012. Meanwhile in Oxnard, CA, 23-year-old single mom Lorena Gonzales doesn’t come back from applying for a job.

In Pensacola, FL, Byrd and Melanie Billings, loving parents of 9 adopted children with special needs (in addition to their older biological adult children), 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 Star City, WV home. But a few seconds of surveillance footage leads cops to the most shocking discovery imaginable.