Park Elliott Dietz is a forensic psychiatrist and criminologist who was educated at Cornell University

Cornell University

Cornell University is an Ivy League university located in Ithaca, New York, United States. It is a private land-grant university, receiving annual funding from the State of New York for certain educational missions...

 and Johns Hopkins University

Johns Hopkins University

The Johns Hopkins University, commonly referred to as Johns Hopkins, JHU, or simply Hopkins, is a private research university based in Baltimore, Maryland, United States...

 (M.D., 1975; M.P.H., 1975; Ph.D. (Sociology), 1984). Dietz later served as a resident and fellow in psychiatry at Johns Hopkins Hospital and a resident and chief fellow in forensic psychiatry at University of Pennsylvania

University of Pennsylvania

The University of Pennsylvania is a private, Ivy League university located in Philadelphia, Pennsylvania, United States. Penn is the fourth-oldest institution of higher education in the United States,Penn is the fourth-oldest using the founding dates claimed by each institution...

, an assistant professor of psychiatry at the Harvard Medical School

Harvard Medical School

Harvard Medical School is the graduate medical school of Harvard University. It is located in the Longwood Medical Area of the Mission Hill neighborhood of Boston, Massachusetts....

 and a professor of law and of behavioral medicine and psychiatry at the University of Virginia

University of Virginia

The University of Virginia is a public research university located in Charlottesville, Virginia, United States, founded by Thomas Jefferson...

. He has published widely in the fields of criminology and forensic psychiatry. He has served as a clinical professor of psychiatry and biobehavioral sciences at the UCLA School of Medicine, and now is President of Park Dietz & Associates, a forensic consulting firm[1]and Threat Assessment Group, [2] a workplace misconduct prevention firm.

Dr. Dietz is best known for his forensic consulting in many of the most controversial criminal and civil cases of the past 30 years, often on behalf of state and federal prosecutors. Among his most notable criminal cases are those of John Hinckley, Jr., Jeffrey Dahmer

Jeffrey Dahmer

Jeffrey Lionel Dahmer was an American serial killer and sex offender. Dahmer murdered 17 men and boys between 1978 and 1991, with the majority of the murders occurring between 1987 and 1991. His murders involved rape, dismemberment, necrophilia and cannibalism...

, Andrea Yates

Andrea Yates

Andrea Yates is a former Houston, Texas resident who killed her five children on June 20, 2001 by drowning them in the bathtub in her house. She had been suffering for some time with very severe postpartum depression and postpartum psychosis...

, Deanna Laney, Susan Smith

Susan Smith

Susan Leigh Vaughan Smith is an American woman sentenced to life in prison for murdering her children. Born in Union, South Carolina, and a former student of the University of South Carolina Union, she was convicted on July 22, 1995 of murdering her two sons, 3-year-old Michael Daniel Smith, born...

, Cary Stayner

Cary Stayner

Cary A. Stayner is an American serial killer currently on death row for the 1999 murders of four women in Mariposa County near Yosemite, California.-Early life:Stayner was born and raised in Merced, California...

, Polly Klaas

Polly Klaas

Polly Hannah Klaas was an American murder victim whose case gained national attention. At the age of twelve, she was kidnapped at knife point from her mother's home during a slumber party in Petaluma, California, on October 1, 1993. She was later strangled...

, the Menendez Brothers

Lyle and Erik Menendez

Joseph Lyle Menendez and Erik Galen Menendez are brothers who are known for their conviction in a highly publicized trial for the shotgun murders in 1989 of their wealthy parents, entertainment executive Jose Menendez and his wife Mary "Kitty" Menendez , residents of Beverly Hills, California...

 (retrial), John duPont

John Eleuthère du Pont

John Eleuthère duPont was an American multimillionaire and member of the prominent du Pont family who was convicted of murder in the third degree...

, The Unabomber, the New York Zodiac

Heriberto Seda

Heriberto "Eddie" Seda is an American serial killer who struck New York City from 1990 to 1993. Before being caught on June 18, 1996, Seda killed three people and critically wounded four. Seda is believed to have admired San Francisco’s Zodiac Killer for avoiding capture. Seda was convicted in...

, the Prom Mom Case

Melissa Drexler

Melissa Drexler , gained infamy for delivering a baby in a restroom stall at her high school prom and putting the body in the trash before returning to the dance. She pled guilty to aggravated manslaughter, and was sentenced to fifteen years of imprisonment...

, the DC Snipers.

For an HBO documentary, he interviewed Mafia contract killer Richard Kuklinski

Richard Kuklinski

Richard Leonard "The Iceman" Kuklinski was an American contract killer. The 6'5" , 300 pound Kuklinski worked for Newark's DeCavalcante crime family and New York City's Five Families. He claimed to have murdered over 250 men between 1948 and 1986...

, also known as "The Ice Man", because he would freeze the corpses of some of his victims in a big industrial freezer, to disguise the time of death.