Shadow of a Doubt

Shadow of a Doubt refers to episode 5 of the Season 8 of the television series "Forensic Files" which was broadcast for the first time on April 29, 2003.

Plot summary
In 1997, Jennifer Myers is shot to death in her store just one day before she is to testify against the man accused of robbing her, Kevin Dowling. The robber becomes the prime suspect, but he has a solid alibi: a time-stamped videotape of his outdoor activities on the day of the murder. Police asked a local physics professor to help them authenticate the videotape which enabled them to find the killer who was hiding in the shadows.