In Dalton, Georgia, someone stabs convenience store clerk Dahyabhai Kalidas Chaudhari to death at his job. Police turn to security footage for answers and discover a surprise revelation about the killer's identity that blows the case wide open.

In 2009 in Tracy, Calif., a little girl vanishes after playing at a friend's house, leaving her family desperate for answers; with no leads and few clues, investigators must rely on surveillance footage to piece together the horrifying truth.