SPRINGFIELD — The state’s top court has ruled the “one act, one crime” doctrine did not prevent a man’s separate convictions for the same act of gun possession. The Illinois Supreme Court ruled the concept, in place since the late 1970s and which says defendants can’t be convicted of multiple offenses derived from precisely the same action, did not preclude Leshawn Coats’ convictions for armed violence and being an armed habitual criminal, two charges stemming from his possession of a firearm in June 2013. The former of …