FOLSOM, Pa. (AP) -- Police say a Philadelphia man shot and killed his 5-year-old son and critically wounded the boy's mother before trying to kill himself as officers closed in. Investigators say 26-year-old Tyrell Styles shot his son, Cion, in the head and wounded Shyema Washington at a suburban apartment complex where they had been attending a children's birthday party Saturday night. Ridley Township police say Styles led them on a chase then shot himself after officers cornered his vehicle. Investigators tell the Delaware County Daily Times that Washington and her son had been staying with relatives after a recent argument with Styles. Officials say he had no criminal record and was licensed to carry the gun. Police say Styles was on life support on Sunday. Washington was in critical condition.