In June 1968, President Lyndon Johnson formed The National Commission on the Causes and Prevention of Violence to study the rise in political, racial, and other criminal violence in America. Barr served on several of the Commission’s task forces including; The Task Force on Assassination and Political Violence, the Task Force on Firearms, and the Task Force on Law and Law Enforcement, among others. In the reports of these task forces, Barr is listed under Commission Staff Officers as the Deputy Director. Lloyd N. Cutler, Barr's colleague and friend, is listed as the Executive Director. Library of Congress Catalog Card Number: 74-603981 In August 1992, Barr along with his partners at Cravath, Swaine & Moore, David Boise and Evan R. Chesler participated in a mock trial of Lee Harvey Oswald at the annual meeting of The American Bar Association. Barr and his colleagues took the role of Oswald's defense. The mock trial took place over two days. A five member jury found Oswald not guilty with a vote of 3-2. A transcript of the mock trial was published as
The Trial of the Century: America vs. Lee Harvey Oswald. Barr was a member of the Board of Directors and a faculty member at the Salzburg Seminar in American Studies, now called the
Salzburg Global Seminar. The Seminar, based at Schloss Leopldskron in Salzburg, Austria "was established in 1947 as a means of bringing together young intellectuals from nations recently at war to discuss topics of mutual interest." According to the List of Participants of the 1998 meeting of the Board of Directors, Barr was a Board Member from 1993-1996 and 1998-2001 and participated as faculty in four seminars. In 1993, Barr was faculty in a seminar called American Law and Legal Institutions, in which United States Supreme Court Justice Stephen Breyer, Lord Slynn of Hadley, and Lloyd N. Cutler also participated. ==Memorial==