Police said the shooting happened just before 3 p.m. in the 1200-block of South Michigan Avenue. The victim was inside a parking garage when he was confronted by the suspect, who pulled out a gun and opened fire.
The victim was struck in the leg and taken to Northwestern Memorial Hospital in initially reported good condition.
Police said the shooter has been taken into custody and a gun was recovered. Police have not offered a motive for the shooting, but residents said there have been an uptick in carjackings and car thefts recently.
"You think when you move to a nice area that things are going to get better, but it actually gets worse," said Charisma August, South Loop resident. "They're targeting nice areas. They're targeting people with money. They're targeting cars that look nice."
August said her car was stolen last month from the front of her apartment building, which is connected to the garage where the shooting happened Monday.
"If you leave your car on, they're taking your car. If you have a nice car, an Audi or a Lamborghini, it's got to be a foreign or something nice, they're taking people's cars," she said.
There is a large police presence near Michigan and Roosevelt at the start of the evening rush, but traffic is moving.