Coatesville Police say they arrested a 33-year-old Coatesville woman Monday night after she allegedly attacked a Valley Township Officer. Police that woman, identified as Silisa E. Simpson, jumped onto the hood of a marked police vehicle in the unit block of Strode Ave. Monday shortly after 9:20 p.m. When that officer attempted to take Simpson into custody, she struck the officer with her cell phone, causing injury. A bystander assisted, helping to hold Simpson, until Coatesville Police could arrive to assist. Simpson was taken into custody without further incident and charged with multiple offenses, including aggravated assault.