I’m a Philly Forensic Psychologist who has Conducted Dozens of Psychopathic Evaluations – Here’s Why an Evaluation of R.C. Horsch in the ‘80s Didn’t Identify Him as a Possible Psychopath

The Conversation

October 20, 2026

David DeMatteo, JD, PhD, a professor in the Kline School of Law, authored an Oct. 20 column in The Conversation about the history of diagnosing psychopathy.

I’m a Philly Forensic Psychologist who has Conducted Dozens of Psychopathic Evaluations – Here’s Why an Evaluation of R.C. Horsch in the ‘80s Didn’t Identify Him as a Possible Psychopath

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