David Berkowitz, formerly the Son of Sam serial killer, was cured of his demonic sickness he blamed on occult and satanic influences. He now promotes outreach to try to help prevent other victims of crimes that could be prevented.
His case brings up the issue: Can some cases of criminal illness be cured?
What about cases of Schizophrenia treated successfully by exorcism and deliverance?
Sources: Scott Peck's "Glimpses of the Devil" and "People of the Lie" where he urges medical professionals to pursue formal research and development in the field of therapy using deliverance prayer to remove the cause of demonic voices/obsessions. The two patients he observed were not curable or treatable until AFTER the exorcism process was applied.
Son of Sam/Son of Hope testimony on what caused his killing obsessions and what led to his cure and transformation:
http://www.ariseandshine.org/Testimony-&-Translations.html
Why shouldn't deadly forms of criminal illness be treated as a disease like other dangerous conditions?
Why is this punished instead of diagnosed and treated?