David Abrahamsen

Abrahamsen's expertise in psychopathology was enlisted by authorities during the notorious Son of Sam serial murder case: when the killer, David Berkowitz, was finally in custody, Abrahamsen was directed by the Brooklyn District Attorney to evaluate his ability to stand trial. He deemed him competent, but Berkowitz never went to trial, pleading guilty instead and receiving multiple life sentences. Abrahamsen continued to examine Berkowitz in jail, and ultimately documented his life in Confessions of Son of Sam (1985).

Abrahamsen's paper, A Study of Lee Harvey Oswald: Psychological Capability of Murder, was published in the Bulletin of the New York Academy of Medicine, in October 1967. His book, Our Violent Society, came out in 1970, a Funk & Wagnalls' publication.

He moved to the United States in 1940 and joined the staff at St. Elizabeth's Hospital in Washington, D.C. Later he served as a psychiatrist and criminal psychopathologist at two major prisons in the U.S., first the Illinois State Penitentiary in Joliet, and then the Sing Sing Correctional Facility in Ossining, New York. He also worked for the New York State Psychiatric Institute at Columbia University, and served as a teacher and research associate at Columbia's College of Physicians and Surgeons.

David Abrahamsen (June 23, 1903 – May 20, 2002) was a Norwegian forensic psychiatrist, psychoanalyst, and author who wrote analyses of Richard M. Nixon and David Berkowitz.

Abrahamsen was born in Trondheim, Norway in 1903. He studied medical science at the Royal Frederick University in Oslo and graduated in 1929. He eventually relocated to England, taking positions at the Tavistock Clinic and the London School of Economics.