First Aired: May. 15, 2007 on NBC
Summary: The team investigates the death of a partially clothed teenage boy wearing a leather mask. The detectives discover that the victim's best friend (Michael Welch) is the killer and has a video, showing that the boy's death was the result of a backyard wrestling match gone wrong.
Main Characters in this Episode
- Goof (incorrectly regarded as a mistake): Cassandra's doctor incorrectly states that wisdom teeth only erupt in adulthood. While it is true that in most cases wisdom teeth only erupt after age 17, they can erupt much earlier. - The doctor didn't say "only", she made a generalized statement that they come in during adulthood and was a clue which lead to a further examination.