Park Dietz

Park Dietz

Park Dietz & Associates, Inc.
2906 Lafayette Ave.
Newport Beach, CA 92663
Office: 949-723-2211

PD&A offers forensic experts in psychiatry, psychology, neuropsychology, neurology, pathology, nursing, social work, criminal behavior analysis, police, corrections, security, and toxicology. For the 28 years we've been operating as a group we've consistently recruited and vetted leaders in their respective disciplines known for their high integrity who share a common commitment to conduct top quality, objective evaluations and to thoroughly and clearly document and communicate their data, findings, and opinions.

The scores of experts associated with the firm have massive experience—including evaluations, consulting, testimony, research, and peer-reviewed publications—on a wide range of topics, most conspicuously including competence, insanity, homicide, sexual crimes and misconduct, suicide, workplace violence, the effects of trauma, and civil litigation arising from traumatic events, including accidents, suicide, homicide, sexual assaults, child sexual abuse, and workplace violence.

For many cases, we are able to offer the services of the nation’s best expert on the critical issue in the case. In others, we may offer a selection of experts who are equally qualified. During an initial, free consultation with PD&A you may learn of other ways that you might be assisted.

The firm was founded in 1996 by forensic psychiatrist Park Dietz, MD, MPH, PhD, and grew out of a practice he began in 1978 while teaching at Harvard Medical School.

Areas of Expertise
  • Apartment/Condominium Security
  • Autopsies
  • Child Sexual Abuse
  • Competency
  • Crime Foreseeability
  • Crime Scene Analysis
  • Elder Abuse
  • Forensic Psychiatry
  • Forensic Psychology
  • Human Trafficking
  • Inadequate/Negligent Security
  • Independent Medical Examinations
  • Law Enforcement
  • Lie Detector/Polygraph
  • Medical Fraud
  • Neurodevelopmental Disorder/Disability
  • Neuropsychology
  • Pathology
  • Post Traumatic Stress Disorder
  • Sanity/Competency to Stand Trial
  • Sexual Abuse
  • Social Work/Social Services
  • Stalking
  • Suicide
  • Testamentary Capacity
  • Undue Influence
  • Violent Crimes
  • Workplace Violence

Expert Background
Q: Please list your professional accreditations, degrees, licenses, and certificates granted:
A: Within our firm you will find experts who have been:

Educated at Harvard, Princeton, Yale, Dartmouth, Columbia, Cornell, the University of Pennsylvania, Johns Hopkins, Stanford, U.C. Berkeley, U.C.L.A., the University of Virginia, Duke, and other major universities

Medical and law school professors at Harvard, Columbia, Cornell, the University of Pennsylvania, N.Y.U., U.C.L.A., the University of Virginia, Emory University, the University of Ottawa, the University of Toronto, and other major universities

Current and former heads of hospitals, a mental health system, academic departments, medical examiner offices, a community mental health center, teaching clinics, psychiatry training programs, child and adolescent psychiatry training programs, forensic psychiatry training programs, psychology-law programs, research programs, corporate security departments, and F.B.I. investigative units, teams, and programs

Board certified in psychiatry, forensic psychiatry, child and adolescent psychiatry, neurology, forensic pathology, and various medical and surgical specialties and subspecialties

President, Vice President, and committee chair for national professional organizations, such as the American Academy of Psychiatry and the Law, the American Academy of Forensic Sciences, the American Psychology-Law Society, and the National Organization of Forensic Social Work

Board examiners for the American Board of Psychiatry and Neurology

F.B.I. supervisors and members of the internationally recognized Behavioral Science Unit and Behavioral Analysis Units of the F.B.I.’s National Center for the Analysis of Violent Crime
Q: Please list your affiliations or memberships in any professional and/or industry organizations:
A: PD&A experts are affiliated with the relevant organizations in their disciplines, and several have led their national organizations. For example, Drs. Dietz and Knoll are Past Presidents of the American Academy of Psychiatry and the Law, Dr. Martell is a Past President of the American Academy of Forensic Sciences, and Dr. Warren is a Past President of the National Association of Forensic Social Work.
Q: Please list any teaching or speaking experience you have had, including subject matter:
A: Most PD&A experts hold faculty appointments at major universities or taught at the FBI Academy while on active duty, and they have been invited to deliver more than 5,000 lectures and training programs in 40 countries in the Caribbean, North America, Central America, South America, western Europe, eastern Europe, the Middle East, Africa, Asia, Australia, and the South Pacific

Commissioners or consultants to federal and state government commissions

Invited to testify before the U.S. Congress and state legislatures

Authors of more than 3,000 professional publications

Editors of professional journals and books
Q: Have any of your accreditations ever been investigated, suspended or removed? (if yes, explain)
A: No.
Q: On how many occasions have you been retained as an expert?
A: PD&A has been retained in approximately 5,000 cases since the firm began operating in 1996, and some of our experts had been retained in over 1,000 cases before being invited to join PD&A.

PD&A experts have been consultants to state and local governments in every state in the U.S., every province in Canada, and 25 other nations in the Caribbean, Central America, South America, western Europe, eastern Europe, the Middle East, Africa, Asia, Australia, and the South Pacific.

PD&A experts have been retained as consultants and trainers by more than 500 corporations on workplace violence issues.

PD&A experts have consulted on more than 30,000 criminal investigations throughout the world.

Examiners in more than 30,000 forensic mental health evaluations and 25,000 forensic autopsies
Q: For what area(s) of expertise have you been retained as an expert?
A: PD&A experts have testified in thousands of civil and criminal matters on a wide array of issues. PD&A experts have testified or consulted in an unusual number of criminal matters of national and international interest, such as those involving:

• Serial killers, including Jeffrey Dahmer, Gerald Gallego, Robert Berdella, William Bonin, the I-5 Strangler, Richard Cottingham, Son of Sam, Douglas Daniel Clark, Arthur Shawcross, Cleophus Prince, Joel Rifkin, Ricardo Caputo, Robert Shulman, the Zodiac, Gerald Parker, the Green River murders, John McRae, the New York Zodiac, Kendall Francois, D.C.’s Shotgun Stalker, Joe Metheny, Andrew Urdiales, Paul Runge, Larry Gene Bell, Charles Ng, Paul Reid, Cary Stayner, Harvey Miguel Robinson, the D.C. Snipers, the Phoenix Shooters, and Joseph Edward Duncan III
• Mass murders, including those at Standard Gravure in Louisville, General Dynamics in San Diego, Xerox in Honolulu, Wal-Mart in El Paso, the Tree of Life Synagogue, and that by Dylann Roof
• School shootings at Columbine High School and schools in Colorado, California, Oregon, and Georgia
• Child killings, including Polly Klaas and JonBenet Ramsey
• Infanticide cases, including Amy Grossberg and the Prom Mom
• Attacks at the White House, the U.S. Capitol, the Today Show, abortion clinics, and churches
• Assassinations and attempts against Congressman Allard Lowenstein, President Reagan, and Congresswoman Gabrielle Giffords
• War crimes on behalf of the United Nations International Criminal Tribunal for the former Yugoslavia, in The Hague, the Netherlands
• Stalkers of John Lennon, Rebecca Schaeffer, Cher, Olivia Newton-John, and Michael Jackson
• Bombers, including Walter Leroy Moody, the Unabomber, the Mail Box Bomber, and bombings at the World Trade Center, Oklahoma City, Atlanta Olympics, and Boston Marathon
• Murders, including mass murder, domestic violence, workplace homicide, campus homicide, robbery murder, sexual homicide, gang violence, juvenile offenders, prison homicide, and the prosecutions of the Menendez brothers, John DuPont, Susan Smith, and Dylann Roof
• FBI Top Ten Fugitives, including Alton Coleman, Michael Wayne Jackson, and Eric Rudolph
• Hostage and barricaded subject situations, including the Branch Davidian’s, Ruby Ridge, and the Freeman Standoff

Examples of civil matters in which PD&A experts have testified or consulted include those involving:
• Claims against the Big Brothers, Boy Scouts of America, Y.M.C.A., Roman Catholic Church, Church of Jesus Christ of Latter-day Saints, Jehovah’s Witnesses, foster care services, schools, boarding schools, camps, sports teams, hospitals, and other organizations for sexual offenses against children
• Claims of psychological damages arising from alleged radioactivity and toxic exposures, such as a suit arising from workers at the Hanford Site, and from mass disasters, such as the San Bruno pipeline explosion
• Claims against property owners, motels, hotels, malls, department stores, convenience stores, and other businesses, schools, and universities for crimes on their premises, including the shootings at the Vera Wang Bridal Salon, the Empire State Building, and Virginia Tech
• Claims that medications caused a person to commit suicide, homicide, or murder-suicide
• The suit against the Jenny Jones Show and Warner Brothers for a former guest’s criminal conduct
• The suit against the Dr. Phil Show and CBS for a show about the disappearance of Natalee Holloway
• Malpractice and institutional negligence claims such as those arising from patient suicide, murder by a current or former patient, the Ramona “recovered memory” malpractice trial, and the suit against Spring Shadows Glen Hospital for allegedly inducing multiple personality disorder in their patients
• The Sam Sheppard and O.J. Simpson civil cases
• The suit against the C.I.A. for alleged brainwashing experiments among Canadian mental patients
• Claims of undue influence resulting in fiduciary abuse of elders
• The Orange County bankruptcy litigation
• Civil suits against Soldier of Fortune magazine for murders for hire contracted through hit man advertisements
• Civil, criminal, and political questions arising postmortem, as in the Anthrax attack and the explosion aboard the U.S.S. Iowa
Q: In what percentage of your cases were you retained by the plaintiff?
A: This varies by individual expert.
Q: In what percentage of your cases were you retained by the defendant?
A: This varies by individual expert.
Q: On how many occasions have you had your deposition taken?
A: This varies by individual expert.
Q: When was the last time you had your deposition taken?
A: For many of our experts, the answer to this question would be within the past month.
Q: On how many occasions have you been qualified by a court to give expert testimony?
A: This varies by individual expert.
Q: On how many occasions have you testified as an expert in court or before an arbitrator?
A: This varies by individual expert.
Q: For how many years have you worked with the legal industry as an expert?
A: Dr. Dietz has worked with the legal industry as an expert since 1978, and PD&A as a firm has done so since 1996, but this varies by individual expert.
Q: What services do you offer? (E.g.: consulting, testing, reports, site inspections etc.)
A: At PD&A, our forensic experts can be retained in a consulting or testifying capacity to conduct psychiatric, psychological, neuropsychological, and neurological evaluations and testing; to conduct autopsies and exhumations; to analyze crime scenes and criminal behavior; to evaluate whether the standard of care was met in the practice of medicine or psychology, drug rehabilitation, child protection, elder protection or workplace prevention, to analyze toxicology data; to conduct security surveys; to conduct social science surveys; and to analyze data.
Q: What is your hourly rate to consult with an attorney?
A: The fees of retained experts vary depending on the discipline and experience of the expert and whether the fees are from public or private sources.
Q: What is your hourly rate to review documents?
A: All work by PD&A experts on a case is billed at the same hourly rate.
Q: What is your hourly rate to provide deposition testimony?
A: All work by PD&A experts on a case is billed at the same hourly rate.
Q: What is your hourly rate to provide testimony at trial?
A: All work by PD&A experts on a case is billed at the same hourly rate.
Q: Please list any fees other than those stated above (E.g.: travel expenses, copy fees, etc.)
A: Travel expenses are billed at cost and a 10% administrative fee is applied to hourly fees.


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402 W. Broadway
Suite 1140
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Ph: 619-239-0300

Glen Feinberg, Esq.
Feinberg D'Avanzo & Gasbarro, LLP
200 Executive Blvd.
Suite 200A
Ossining, NY 10562
Ph: 914-391-7671

Edward Zas, Esq.
Federal Defenders of New York
52 Duane Street
New York, NY 10007
Ph: 212-417-8748

Cynthia Wright, AUSA
U.S. Attorney's Office
Homicide Section - Special Victim's Unit
555 4th Street, NW
Room 9834
Washington, DC 20530
Ph: 202-252-7217

AUSA Soo Song
US Attorney's Office
700 Grant Street
Suite 4000
Pittsburgh, PA 15219
Ph. 412-894-7420