An investigation into a school threat in Southern California led to the arrest of a 15-year-old girl in Riverside County, police said. Detectives and school resource officers with the Corona Police Department responded Tuesday after a threat was reported within the Corona-Norco Unified School District, according to a Facebook post from the department. “The investigation […]An investigation into a school threat in Southern California led to the arrest of a 15-year-old girl in Riverside County, police said. Detectives and school resource officers with the Corona Police Department responded Tuesday after a threat was reported within the Corona-Norco Unified School District, according to a Facebook post from the department. “The investigation […]