 Dietz also noted that Dahmer strongly identified with evil and corrupt characters from both "The Exorcist III" and "Return of the Jedi"; particularly the level of power held by these characters.Expounding on the significance of these movies on Dahmer's psyche and many of the murders committed at the Oxford Apartments, Dietz explained that Dahmer occasionally viewed scenes from these films before searching for a victim.Dietz diagnosed Dahmer with substance use disorder, paraphilia, and schizotypal personality disorder.