John Macdonald (psychiatrist)

John Marshall Macdonald (9 November 1920 in Dunedin, New Zealand – 16 December 2007 in Englewood, Colorado) was a forensic psychiatrist most renowned for his discovery 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)

John Marshall Macdonald (9 November 1920 in Dunedin, New Zealand – 16 December 2007 in Englewood, Colorado) was a forensic psychiatrist most renowned for his discovery of the Macdonald triad of sociopathic traits and his profiling of serial killers. He published approximately a dozen books in his field.