CHICAGO (AP) – Authorities say a man posted disturbing social media videos before he killed three people and wounded four others in a series of shootings that started on Chicago’s South Side and ended with his death in a suburban police shootout. Chicago police Superintendent David Brown told reporters that investigators are trying to determine a motive for the attacks. They began Saturday afternoon with the killing of a 30-year-old University of Chicago student from China in a parking garage in the Hyde Park neighborhood. He says 32-year-old Jason Nightengale went on to shoot people in an apartment complex, a store and a car before heading to Evanston, where he shot someone in a restaurant before police killed him.
