William P. Mullen is the 53rd Sheriff of Allegheny County, elected to terms in 2006, 2009, 2013, and 2017 to serve the region’s 1.2 million citizens. He joined the Sheriff’s Office as Chief Deputy in 2006. Sheriff Mullen is an alumnus of South Catholic High School and the University of Dayton, where he earned a bachelor’s degree in Political Science. He is a graduate of the F.B.I. National Academy in Quantico, Virginia, Disaster Management School in Emmitsburg, Maryland, and the National Sheriff