Walter Signorelli is a practicing attorney and an adjunct professor of law and police science at John Jay College of Criminal Justice in New York City. He was previously a member of the New York City Police Department for thirty-one years, and today he is a criminal defense attorney and a police practices and procedures expert. Signorelli graduated cum laude from St. John?s University School of Law before later graduating from the Columbia University Police Management Institute. He has written three books related to law and police science: The Crisis of Police Liability Lawsuits (2006), Criminal Law, Procedure, and Evidence (2011), and The Constable Has Blundered (2012), which received a recommended rating by the Choice Review for Academic Libraries.