The Chicago Sun-Times reports 22-year-old Patrick Calhoun is charged with aggravated battery in connection with Sunday morning's shootings.
Prosecutors didn't offer a motive for the shooting, which they say took place when Calhoun returned to a party with a gun and opened fire in a crowded basement.
Among those injured was a 19-year-old standout basketball player who's a senior at Orr Academy.
Tyquone Greer was shot in the calf. He says guests were "just out having a good time, partying and enjoying ourselves when the shots rang out."
Calhoun's lawyer says the man does maintenance work at O'Hare International Airport.
"The boys are 16-17 years old, they know their friend got shot," said Orr Academy basketball coach Louis Adams. "Teammate is second, but their friend is first and the boys are taking it pretty hard."
Police say the shooting took place around 3:30 a.m. Sunday, after an argument broke out between two of those present at the party. They say the shooter left, came back with a gun and began shooting.
A close friend said Greer was simply in the wrong place at the wrong time and that his main concern now is not his high school basketball career, which is likely over, but the well-being of close friend Deshawn King, a former Orr player who Adams confirms was shot three times.
"Deshawn King played with me two years ago," the coach said. "He was attending the University of Asheville in Iowa. I went over to see Deshawn, he's getting better."
The Associated Press contributed to this report.
