With more than 30 years of criminal law practice experience, John L. Costello has authored many legal publications and articles, including Virginia Criminal Law and Procedure, Second Edition (Michie, 1995).
He is Emeritus Professor of Law at Antonin Scalia Law School, George Mason University, where he taught courses in Virginia Remedies, Virginia Practice, Criminal Law, Criminal Procedure, Evidence, Federal Courts, and Professional Responsibility.
Before entering academia, Professor Costello served for three years as Associate Judge for the U.S. Army Court of Military Review. He received his J.D. from Dickinson School of Law, and an LL.M. from the University of Virginia School of Law.