About Us Park Dietz & Associates (PD&A) is a leading forensic consulting firm that supports litigators at top law firms and government agencies across the U.S.
We connect attorneys with world-class experts across disciplines to provide case evaluation, testimony, and strategic insight in matters ranging from catastrophic injury and wrongful death to criminal cases and complex multi-plaintiff litigation. Founded over 30 years ago by a nationally recognized forensic psychiatrist, PD&A has built a reputation for being retained on complex and high-profile cases, such as the attempted assassination of President Reagan and the case of Jeffrey Dahmer.