Samuel WalkerSamuel Walker is Professor Emeritus of Criminal Justice at the University of Nebraska, Omaha. He is author of thirteen books on civil liberties, criminal justice and policing. They include In Defense of American Liberties: A History of the ACLU (1990, Hate Speech (1994) and Sense and Nonsense about Crime, 7th edition (2012). He is a frequent commentator on criminal justice and police issues in the national news media and has appeared on CNN, NBC, NPR, PBS Frontline and The History Channel. He has served as a consultant to the US Justice Department and local community groups on police problems. Read More Read Less