Alan Morton Dershowitz (born September 1, 1938) is an American lawyer, jurist, and author. He is a prominent scholar on United States constitutional law and criminal law, and a leading defender of civil liberties. He spent most of his career at Harvard Law School where in 1967, at the age of 28, he became the youngest full professor of law in its history. He held the Felix Frankfurter professorship there from 1993 until his retirement in December 2013. Dershowitz has been involved in several legal cases and is a commentator on the Arab–Israeli conflict. As a criminal appellate lawyer, he has won 13 of the 15 murder and attempted murder cases he has handled, and has represented a series of celebrity clients, including Mike Tyson, Patty Hearst, and Jim Bakker. His most notable cases include his role in 1984 in overturning the conviction of Claus von Bülow for the attempted murder of his wife, Sunny, and as the appellate adviser for the defense in the O.J. Simpson murder trial in 1995.