If you’re a District Attorney, Prosecutor or in Law Enforcement, particularly the FBI, then you’ve heard of the name – Dr Park Dietz.

Dr Dietz is a maven in his field, and one of the world’s leading minds on forensic psychiatry. He, and his company, Dr Dietz has testified for the prosecution in hundreds of criminal and civil cases, including notables like Jeffrey Dahmer, Son of Sam, Columbine High School, Boston Bombers, CBS, and Virginia Tech.

There are two companies under the Dietz name. Park Dietz & Associates (PD&A), and Threat Assessment Group (TAG).

Park Dietz & Associates focuses on forensic expert witness testimony. PD&A is responsible for formulating forensic and expert witness operating standards that are used today.

Threat Assessment Group was founded in 1987 by Dr Dietz as an outgrowth of his unique combination of practical and research experience in injury prevention, the analysis of threatening communications, mental disorders, and criminal behavior. TAG teaches firms to prepare for any type of adverse situation bought on by an employee, such as workplace violence and shootings, as well as intimidation and stalking.