The Behavioral Science Unit became primarily responsible for the training of FBI National Academy students in the variety of specialized topics concerning the behavior and social sciences, and the Behavioral Science Investigative Support Unit became primarily responsible for the investigation of …show more content…
“The FBI investigator actually wrote the book on criminology, during a career spent researching serial killers and other violent offenders.” “Before he joined the bureau, Ressler's time in military and civilian law enforcement had piqued his curiosity about crimes that were tough to understand: violent, sometimes sexual and always seemingly irrational.” “… Ressler thought that by figuring out how — and why — those criminals worked, … [the] police could better figure out who they were looking for.” Joining the FBI in 1970, Russler was able to convince “… the legitimacy of criminal profiling” to the Bureau. Russler was also known for “face-to-face interview with the most notorious and successful serial killers at that particular time” such as Ted Bundy and Jeffrey Dahmer.
Many people believe there are three main early signs of a serial killer. According to forensic psychiatrist J.M. Macdonald’s 1963 paper, “The Threat to Kill”, the three signs (also known as the Macdonald Triad) are animal cruelty, fire-setting, and bed-wetting. “The triad states that [these] three common behaviors during childhood can point to murder-prone children” “In the paper, Macdonald observed that these behaviors were frequently seen in his most aggressive and sadistic