A 14-year-old was arrested in Chico on Friday after he attacked a 71-year-old woman on the Chico High campus, according to the Chico Police Department. Custodial staff discovered the woman with severe injuries on the grounds of the stadium. The investigation revealed that the victim regularly used the Chico High track for exercise. About an hour after the Chico High graduation ended Thursday night, the woman started exercising on the track. She was then pursued and attacked from behind . Investigators determined that the suspect was a 14-year-old boy. The Chico Police said that he was found and arrested for attempted murder.