Prince William County Government--emergency Only V/tty, Criminal Investigations Division Manassas, Violent Crimes Unit Manassas, VA 20108 Phone : (703) 792-7230 Business Category Government Offices & Public Schools Prince William County Of--manassas, Police Department, Eastern District Offices Garfield, Crime Investigations Division Manassas, VA 20110 Phone : (703) 792-7230 Business Category Government Offices-County Police Departments Government Offices & Public Schools Prince William County Of--manassas, Police Department, Criminal Investigation Division Ferlazzo, Crimes Against Persons Manassas, VA 20110 Phone : (703) 792-7230 Business Category Government Offices-County Police Departments Government Offices & Public Schools Prince William County--police Department, Criminal Investigation Division, Violent Crime Unit Manassas, VA 20110 Phone : (703) 792-7230 Business Category Government Offices-County Police Departments Government Offices & Public Schools