who developed what is considered to be the industry standard for assessing and diagnosing sociopathy
Psychopathy Checklist The PCL was originally developed in the 1970s by Canadian psychologist Robert D. Hare[3] for use in psychology experiments, based partly on Hare's work with male offenders and forensic inmates in Vancouver, and partly on an influential clinical profile by American psychiatrist Hervey M. Cleckley first published in 1941.