Milwaukee police said a 15-year-old girl has died three days after she was stabbed in the head with a screwdriver during an after-school fight.Liliana Razo died Monday at Children's Hospital of Wisconsin, police said. Police Sgt. Mark Stanmeyer said police have arrested an 18-year-old man in connection with the stabbing and were seeking a 19-year-old man. Authorities said two groups of people fought outside South Division High School on Friday. School security officials broke up the fight but the participants reconvened at a second location six blocks away, where the stabbing occurred while Razo was sitting in a car.Razo was a freshman at South Division High.