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John Macdonald (psychiatrist)
John Marshall Macdonald
(9 November 1920 in
Dunedin
,
New Zealand
– 16 December 2007) 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.
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