“
The BSU, under Unit Chief Jack Pfaff at the time I took my hostage-negotiation training, was dominated by two strong and insightful personalities—Howard Teten and Patrick Mullany. Teten is about six foot four with penetrating eyes behind wire-rim glasses. Though an ex-Marine, he’s a contemplative type—always totally dignified; the model of an intellectual professor. He joined the Bureau in 1962 after serving with the San Leandro, California, Police Department, near San Francisco. In 1969, he began teaching a landmark course called Applied Criminology, which eventually (after Hoover’s death, I suspect) became known as Applied Criminal Psychology. By 1972, Teten had gone up to New York to consult with Dr. James Brussel, the psychiatrist who had cracked the Mad Bomber case, who agreed to personally teach Teten his profiling technique. Armed with this knowledge, the big breakthrough of Teten’s approach was how much you could learn about criminal behavior and motives by focusing on the evidence of the crime scene. In some ways, everything we’ve done in behavioral science and criminal investigative analysis since then has been based on this.
”
”
John E. Douglas (Mindhunter: Inside the FBI's Elite Serial Crime Unit)