Question: Park Dietz consulted or testified in many of the highest profile US criminal cases, including a killer who died in 1994, and was also known by what nickname?

Context articles: Ronald Fino
Edward Sapiano
Anthony Serka
José Ugaz
Valentino Mazzia
Park Dietz
John Preston (dog handler)
John Henry Browne
Jeffrey Dahmer
Miles Feinstein

Ronald Fino (born June 1, 1946 in Buffalo, New York) is a noted Federal Bureau of Investigation and Central Intelligence Agency undercover operative.
 He testified before Congress regarding Mafia control and corruption in the Laborers' International Union, as well as the Russian mafia and the illegal shipments of weapons to terrorist organizations.
 Now living in the United States, he is married to well known Russian artist Alla (Boulynko) Fino, whom he met in 1992 in Germany.
 He has a close association with the Putin Administration.
 He has testified in numerous criminal cases in Cleveland, Ohio, Buffalo, New York, Newark, New Jersey, Las Vegas, Nevada, Detroit, Michigan, Los Angeles, California, Chicago, Illinois, and in Canada in Toronto, Ontario regarding organized crime.
 Currently works as a Private Detective in Williamsburg, Virginia.
Edward Sapiano is a Canadian defence lawyer, based in Toronto, Ontario, notable for his role in many high-profile criminal cases.
 He initiated Canada’s largest criminal investigation of police, resulting in the arrest and prosecution of several Toronto police officers and was also involved in the so-called Toronto 18 terrorism trial.
 Edward Sapiano is also noted for demanding immediate DNA testing of his client shortly following the 1996 arrest of the suspected “North York serial rapist”, leading to his client Jeremy Foster's full vindication, despite a false confession to the crime.
 In his quest to get illegal guns off the street, Sapiano also created the only lawyer-operated gun amnesty program available in North America, Piece Options.
 He is also known for starting a database of rulings and judgements to track alleged misconduct among Toronto-area officers which was then retrievable for cross-examinations in other cases by other lawyers.
 Edward Sapiano, after putting his practice on hold for two and a half years due to kidney failure, is set to return to court on 2017 for the Andrea White murder trial, and is cited to be the first lawyer in Canada to practise while undergoing 10 hours of daily dialysis.
 He is regularly featured by media outlets, including The Globe and Mail, CBC, and the New York Times commenting on criminal law issues.
Anthony P. ("Tony") Serka, QC (born 1944) is a British Columbia lawyer who has appeared as counsel on several significant and high profile criminal cases, including in the Supreme Court of Canada.
 In "R. v. Hutt", [1978] 2 S.C.R. 476, Serka acted for a Vancouver woman accused of soliciting.
 As a result of the court's decision, the meaning of the word "solicit" was narrowed.
 The case was noted by the "Canadian Lawyer" magazine to have been one of the rare decisions which left "lasting impressions on the legal and sociological landscape."
 Serka also appeared in "R. v. Smith", [1987] 1 S.C.R. 1045, which was the first decision to deal with minimum sentencing laws after the advent of the Canadian Charter of Rights and Freedoms.
 Serka was successful in overturning the seven-year minimum sentence provision for importation of narcotics.
 In reaching its decision, the court in "Smith" elaborated on the meaning of "cruel and unusual punishment" under section 12 of the Charter.
José Carlos Ugaz Sánchez-Moreno (born June 15, 1959) is a Peruvian jurist.
 He served as Ad-Hoc Attorney of Peru for the highest profile criminal cases in recent Peruvian history, involving the investigation of former President Fujimori and his chief of intelligence, Vladimiro Montesinos.
Valentino D. B. Mazzia (February 17, 1922 – March 10, 1999) was an American physician who served as chairman of the department of anesthesiology at the New York University School of Medicine and was a pioneer in the forensic analysis of deaths occurring during surgical procedures.
 He testified in many criminal cases about the use and presence of anesthesia products in cases of death.
Park Dietz (born 1948) is a forensic psychiatrist who has consulted or testified in many of the highest profile US criminal cases including Joel Rifkin, Arthur Shawcross, Jeffrey Dahmer, The Unabomber, Richard Kuklinski, the Beltway sniper attacks, and Jared Lee Loughner.
John Preston (died 2008) was a dog handler and former state trooper from Pennsylvania who testified for the prosecution in criminal cases across the country in the early 1980s.
 Preston claimed that his dog (named Harass II or Harrass 2) could perform feats of forensic detection far beyond the abilities of other investigative dogs.
John Henry Browne (born August 11, 1946) is an American criminal defense attorney practicing in Seattle, Washington.
 Browne is known for both his zeal in defending his clients and his flair for garnering media attention.
 He has represented defendants in a number of high-profile cases, including serial killer Ted Bundy, Colton Harris-Moore (a.k.a. "The Barefoot Bandit"), Benjamin Ng and Martin Pang.
 He has tried over 250 criminal cases to verdict.
 Browne and his actions have been the subject of some controversy, and he has sometimes been criticized for his peculiar and combative style both in and out of the courtroom.
 He is particularly known for obtaining sympathetic treatment for his clients by shifting the focus away from the serious crimes that were committed by arguing for consideration of the background of the defendant and the circumstances in which the events took place.
Jeffrey Lionel Dahmer (May 21, 1960 – November 28, 1994), also known as the Milwaukee Cannibal, was an American serial killer and sex offender, who committed the rape, murder, and dismemberment of seventeen men and boys between 1978 and 1991.
 Many of his later murders involved necrophilia, cannibalism, and the permanent preservation of body parts—typically all or part of the skeletal structure.
Miles Feinstein (born June 25, 1941) is an American criminal law defense attorney, and legal commentator, who has tried many high profile criminal cases.
 Feinstein is Jewish.