School officials who work at Michigan’s Oxford High School could face criminal charges in connection to last week’s shooting that left four students dead, said a prosecutor involved in the case on Monday. Speaking during an interview, Oakland County Prosecutor Karen McDonald said that Oxford High School staff had the legal basis to search alleged shooting suspect Ethan Crumbley’s backpack last week. On Nov. 30, the day of the shooting, Crumbley and his parents were called into a meeting with school staff over Crumbley’s allegedly violent and disturbing drawings depicting shootings. McDonald previously that the meeting, in which school staff members mandated that he seek counseling, occurred before Crumbley allegedly opened fire on his classmates. On Monday, she told CNN that school officials should have searched the 15-year-old’s backpack before he returned to class. “We don’t know exactly if that weapon was in his bag, where it was, we just know …