Marc Weber Tobias is an investigative attorney and security specialist living in Sioux Falls, South Dakota. He has authored six police textbooks, including Locks, Safes, and Securi...view moreMarc Weber Tobias is an investigative attorney and security specialist living in Sioux Falls, South Dakota. He has authored six police textbooks, including Locks, Safes, and Security, (ISBN 978-0398070793), which is recognized as the primary reference for law enforcement and security professionals worldwide.view less