http://www.foxnews.com/us/2018/09/14...r-injured.html

A licensed gun owner was hailed Thursday for his role in helping police in suburban Chicago stop a suspect who was firing an automatic weapon, officials said.

Officials commended the unnamed civilian for his actions as they stood outside a hospital where Cicero police Officer Luis Duarte, 31, was undergoing surgery for four gunshot wounds suffered during the shootout, the Chicago Sun-Times reported.

“We were lucky enough to have a citizen on the street there’s who’s a concealed-carry holder, and he’s also engaged in gunfire,” said Cicero police Superintendent Jerry Chlada Jr.
See, it is possible to get a concealed carry license in Illinois.
Although the reporter is calling him a "licensed gun owner" whatever that is.