Most Evil (2006)

Season 2: Episode 3

Featuring cutting-edge science that may finally reveal the neurological cause of violent schizophrenia, three delusional minds are profiled. Though most schizophrenics never become violent, some of the world's most notorious crimes have involved people whose bizarre breaks from reality have pushed them to murder. Some, like Bob Mullin, who killed 13 people, even hear voices commanding them to kill.