Park Dietz testified in the criminal case against this man whom  was associated with members of the American Mafia
Park Dietz 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 Dillinger John Herbert Dillinger ( ; June 22, 1903 – July 22, 1934) was an American gangster in the Depression-era United States. He operated with a group of men known as the Dillinger Gang or Terror Gang, which was accused of robbing 24 banks and four police stations, among other activities. Dillinger escaped from jail twice. He was also charged with, but never convicted of, the murder of an East Chicago, Indiana, police officer who shot Dillinger in his bullet-proof vest during a shootout, prompting him to return fire; despite his infamy, it was Dillinger's only homicide charge.