An Army special forces sergeant pleaded not guilty Friday to murder and other charges in the killing of three people and wounding of three others during a mass shooting at an Illinois bowling alley.

An attorney for a U.S. Army special forces sergeant arrested in what authorities called an apparently random shooting at an Illinois bowling alley that left three people dead said client may suffer from post-traumatic stress disorder. 

A U.S. Army special forces sergeant based in Florida has been charged in an apparently random shooting at an Illinois bowling alley that left three people dead and three wounded, authorities said Sunday.