Perrota grew up in an extremely abusive household, which the BAU identifies as the root of his antisocial personality.
The episode begins in Baltimore with a brutal triple murder that includes an undercover police officer, Jimmy Baker, who has gone missing. The BAU team, led by Jason Gideon and Aaron Hotchner, discovers that the crime was committed by , a cold, methodical sadist who has likely killed over 100 people across the East Coast. [S1E8] Natural Born Killer
During the final interrogation, Hotch tells Perrota that while some people from abusive homes grow up to be killers, "some people grow up to catch them". This strongly implies that Hotch himself experienced childhood trauma similar to the unsub’s. Perrota grew up in an extremely abusive household,
In 1994, "Natural Born Killers" asked a question culture still hasn't answered During the final interrogation, Hotch tells Perrota that
He is organized and methodical, often using rats to torture his victims—a detail that deeply disturbs even the seasoned profilers.
The team identifies Perrota through his distinctive "signature" of extreme torture and dismemberment.
The case turns into a "turf war" between the BAU and the FBI’s Organized Crime Unit. Unlike typical serial killers who seek emotional or sexual release, Perrota is a professional hitman for the mob, which Gideon describes as a rare "true psychopath".