William B. Evans (born February 23, 1958) is the executive director of public safety and chief of police of Boston College. Previously, Evans was the commissioner of the Boston Police Department from January 2014 until August 2018. Evans served as interim commissioner from November 2013 until he was permanently appointed by newly elected mayor Marty Walsh. He announced his retirement from the Boston Police Department in July 2018. A graduate of Suffolk University, Evans holds a Masters Degree in Cybersecurity from Boston College and another Masters in Criminal Justice from Anna Maria College. He is also a graduate of the FBI’s National Academy, FBI's National Executive Institute , Department of Homeland Security Post Naval Executive Leaders Program and received several certificates from the Kennedy School of Government at Harvard University in subjects ranging from homeland security to preparedness leadership. From Wikipedia, the free encyclopedia.