Police say the officer was trying to pull over 40-year-old Torraize Armstrong, who was driving a car involved in a drive-by shooting on Pennell Street, over the weekend in Chester.
Using the robot means divers in the Chester Police and Fire Departments will spend less time in dangerous waters, which could have fast-moving currents or hazardous debris.
Police said eight people were injured as gunfire broke out during a Memorial Day weekend party held near Subaru Park in Chester, Pa., home of Major League Soccer's Philadelphia Union.