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Macdonald triad. The Macdonald triad (also known as the triad of sociopathy or the homicidal triad) is a set of three factors, the presence of any two of which are considered to be predictive of, or associated with, violent tendencies, particularly with relation to serial offenses.
Lawrence Sigmund Bittaker (September 27, 1940 – December 13, 2019) and Roy Lewis Norris (February 5, 1948 – February 24, 2020), also known as the Tool Box Killers, were two American serial killers and rapists who committed the kidnapping, rape, torture and murder of five teenage girls in Southern California over a five-month period in 1979.
Jack the Ripper has also been called the most infamous serial killer of all time, and his legend has spawned hundreds of theories on his real identity and many works of fiction. [39] H. H. Holmes was a serial killer in the United States, responsible for the death of at least nine victims in the early 1890s.
Park Elliot Dietz (born August 13, 1948) is a forensic psychiatrist who has consulted or testified in many of the highest-profile US criminal cases, including those of spousal killer Betty Broderick, mass murderer Jared Lee Loughner, and serial killers Joel Rifkin, Arthur Shawcross, Jeffrey Dahmer, Ted Kaczynski, Richard Kuklinski, the D.C. sniper attacks, and William Bonin.
Illustration of the triad. The dark triad is a psychological theory of personality, first published by Delroy L. Paulhus and Kevin M. Williams in 2002, [1] that describes three notably offensive, but non-pathological personality types: Machiavellianism, sub-clinical narcissism, and sub-clinical psychopathy.
A 2016 study found that about two-thirds of people (65%) with personality disorders and co-occurring conditions had made multiple suicide attempts, as compared to about one-quarter (24%) of those ...
Dorothy Otnow Lewis is an American psychiatrist and author who has been an expert witness at a number of high-profile cases. She specializes in the study of violent individuals and people with dissociative identity disorder (DID), formerly known as multiple personality disorder. Lewis has worked with death row inmates as well as other prison ...
Rodney James Alcala (born Rodrigo Jacques Alcala; August 23, 1943 – July 24, 2021) was an American serial killer and convicted sex offender who was sentenced to death in California for five murders committed between 1977 and 1979. He also pleaded guilty and received a sentence of 25 years to life for two further murders committed in New York.