HIGHLAND PARK, Ill. (AP) — Police say a gunman on a rooftop opened fire on an Independence Day parade in suburban Chicago, killing at least six people, wounding at least 30 and sending hundreds of marchers, parents with strollers and children on bicycles fleeing in terror. Authorities said 21-year-old Robert E. Crimo III was named as a person of interest in the shooting and was taken into police custody Monday evening after an hourslong manhunt. The July 4 shooting was just the latest to shatter the rituals of American life. Schools, churches, grocery stores and now community parades have all become killing grounds in recent months.