Traces of Truth

Traces of Truth refers to episode 37 of the Season 8 of the television series Forensic Files which was broadcast for the first time on June 24, 2004.

Plot summary
A high school gym teacher mysteriously left town, without saying goodbye to anyone. He later sent letters to explain why. But a closer forensic look at those letters, and a microscopic piece of tissue, gave investigators an entirely different explanation for where he went and why.