John Marshall Macdonald (9 November 1920 in Dunedin, New Zealand – 16 December 2007 in Englewood, Colorado) was a forensic psychiatrist most renowned for his theory of the Macdonald triad of sociopathic traits and his profiling of serial killers. He published approximately a dozen books in his field.
John Macdonald (psychiatrist). (2022, September 1). In Wikipedia. https://en.wikipedia.org/wiki/John_Macdonald_(psychiatrist)
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