Criminal Minds: Season 3, Episode 1

3 - 1: Doubt

The team investigates a serial killer who is targeting brunette women at a small college in Flagstaff, Arizona. The BAU shuts down the campus, creates a detailed profile of the unsub, and arrests a suspect. However, the team members begin to have doubts about themselves when another woman is killed while the suspect is in custody which raises the possibility of a copycat being around the college campus. Agent Jason Gideon works his final case in this episode.