Relying on a grand jury statute and rule, a letter from the circuit clerk and a 1913 Illinois Supreme Court case, Ronald Kliner — who was convicted in 1996 of first-degree murder and conspiracy to commit murder — petitioned for post-conviction relief in 2011, arguing the convictions are void. The statute (Section 112-2(b) of the Illinois Code of Criminal Procedure of 1963) says: “The grand jury shall be impaneled, sworn and instructed as to its duties by the court.” The rule (Illinois Supreme …