Criminal Minds (2005) - 2x12 - Profiler, Profiled

When Morgan is arrested for murder in his hometown of Chicago, the BAU team must profile him and delve into his past in order to prove his innocence.

When Morgan returns home to visit his mother, the local authorities arrest him for the murder of three young boys, one of which occurred during his current visit, the other two over the course of 15 years. Accused of being a serial killer, Morgan is pleased when Gideon, Hotchner and the team rush to his side to get to the bottom of the case. However, when Morgan sternly tells Hotch not to dig into his past, the team realizes that their friend could be in a lot of trouble.