In Chicago, some people who saw the immediate aftermath of the shooting described a confused scene with people yelling and police swarming the area.
“People were shouting at each other, because people thought it was a riot, and so did we,” said Gloria Schmidt, who said she had been inside a nearby courthouse and came outside shortly after the shooting. “It was just hysteria,” she said.
Ms. Schmidt’s husband, Jorge Rodriguez, said he saw a man being taken into custody outside the James R. Thompson Center, a Chicago landmark that houses state government offices and a food court that is popular with downtown workers.
“They just seemed…