HIGHLAND PARK, ILLINOIS - JULY 04: Belongings are shown left behind at the scene of a mass shooting along the route of a Fourth of July parade on July 4, 2022 in Highland Park, Illinois. Police have detained Robert “Bobby” E. Crimo III, 22, in connection with the shooting in which six people were killed and 19 injured, according to published reports. (Photo by Mark Borenstein/Getty Images)

HIGHLAND PARK, Ill. (AP) — The man charged with killing seven people when he unleashed a hail of bullets on an Independence Day parade from a rooftop was expected in court Wednesday. Authorities are facing questions about how he was allowed to buy several guns, despite threatening violence. Robert E. Crimo III was charged with seven counts of murder Tuesday in the shooting that sent hundreds of marchers, parents and children fleeing in fear and set off an hourslong manhunt in and around a Chicago suburb. Investigators have yet to identify a motive. Prosecutors have promised to seek dozens more charges, and Crimo is expected to make his first court appearance on Wednesday. His attorney said he intends to enter a not guilty plea to all charges.