This research, producing multiple scientific studies, led to the establishment of the Fixated Threat Assessment Center next to Buckingham Palace.
[2][5] Meloy has historically been retained by both the prosecution and the defense on various criminal and civil cases, typically involving single or multiple homicide victims.
He continues to consult on threat cases for corporations, foundations, colleges, universities, federal agencies, and public figures.
Meloy has held several teaching positions throughout his career, including a voluntary clinical appointment as a professor of psychiatry at the University of California, San Diego School of Medicine.
[10] The TRAP-18 continues to be the most validated risk assessment instrument concerning lone actor targeted attacks, and is widely used in North America, Europe, Australia, New Zealand, and South Africa.
Meloy has been retained as a consultant or an expert witness on a number of high profile cases, including the murder of Polly Klaas by Richard Allen Davis; the stalking of the pop singer Madonna and the film star Gwyneth Paltrow; and the Oklahoma City bombing cases in the prosecution of the defendants Timothy McVeigh and Terry Nichols.
[11] Timothy Masters, a fifteen-year-old who lived near the field, was brought in for questioning after he claimed to have seen a mannequin on his walk to school that morning.
During the search, police recovered knives, swords, pornography, maps of the crime scene, and over 2000 pages of graphic drawings and writings.
[11] Meloy concluded that Masters' illustrations and narratives could represent depictions of the crime scene and also rehearsal fantasy, particularly explicit drawing of a body being dragged by another person.
Masters was awarded $10 million dollars, and the lead detective on the case was charged with multiple felony counts of perjury.