This disorder is characterized by instability in mood, relationships, self-image, and behavior. Dahmer was diagnosed with this disorder by Dr. Judith Becker, who testified at his trial.
Borderline personality disorder
This is a sexual attraction or act involving corpses. Dahmer admitted to having sex with some of his victims' bodies or parts, and keeping them as trophies. He was diagnosed with this condition by Dr. Park Dietz, who interviewed him extensively.
This is a problematic pattern of substance use that causes impairment or distress. Dahmer had a history of alcohol abuse and addiction, which he said was a way of coping with his loneliness and urges. He was diagnosed with this disorder by Dr. George Palermo, who also interviewed him.
This is a developmental disorder that affects communication and social interaction. Dahmer was diagnosed with this disorder by Dr. Robert Hare, who reviewed his records and interviews. He said Dahmer showed signs of impaired empathy, emotion regulation, and social skills.