The Las Vegas shooter

Dr. Mary Ellen O’Toole has spent her career studying the criminal mind. One of the most senior profilers for the FBI until her retirement in 2009, Dr. O’Toole has helped capture, interview and understand some of the world’s most infamous people, as well as investigate several infamous cases. Dr. O’Toole also worked the Elizabeth Smart and Natalee Holloway disappearances, the Columbine shootings and many other high profile cases. Her law enforcement career spanned 32 years, beginning in the San Francisco’s District Attorney’s Office when she was a Criminal Investigator. Dr. O’Toole worked as an FBI agent for 28 years, spending more than half of her Bureau career in the organization’s prestigious Behavioral Analysis Unit (BAU)—the very unit that is the focus of the hit crime series “Criminal Minds.” Dr. O’Toole is recognized as the FBI’s leading expert in the area of “psychopathy.” Her work in psychopathy has put her on the forefront of mental health and law enforcement efforts to apply the concepts of this personality disorder to both violent and white collar offenders and their behavior and crime scenes.