Alan Morton Dershowitz (; born September 1, 1938) is an American lawyer and academic. He is a scholar of United States constitutional law and criminal law, and a noted civil libertarian. 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. He is now a regular CNN and Fox News contributor and political and legal analyst. Dershowitz has been involved in a number of high-profile legal cases and is a prominent commentator on the Arab–Israeli conflict. As a criminal appellate lawyer, he won 13 of the 15 murder and attempted murder cases he 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 the 1995 O. J. Simpson murder trial in which he served on the "Dream Team" alongside Johnnie Cochran and F. Lee Bailey as an appellate adviser.A political liberal, he is the author of a number of books about politics and the law, including Reversal of Fortune: Inside the von Bülow Case (1985), the basis of the 1990 film; Chutzpah (1991); Reasonable Doubts: The Criminal Justice System and the O.J. Simpson Case (1996); The Case for Israel (2003); Rights From Wrongs: A Secular Theory of the Origins of Rights (2004); and The Case for Peace (2005). His two most recent works were both published in 2018: The Case Against Impeaching Trump and The Case Against BDS: Why Singling Out Israel for Boycott is Anti-Semitic.Dershowitz has received some backlash from liberals and praise from conservatives for his defenses of President Donald Trump against calls for his impeachment and for his criticism of the Special Counsel investigation led by Robert Mueller.