725 ILCS 5/115-1

(725 ILCS 5/115-1) (from Ch. 38, par. 115-1)

Sec. 115-1. Method of Trial. All prosecutions except on a plea of guilty or guilty but mentally ill shall be tried by the court and a jury unless the defendant waives a jury trial in writing.

(Source: P.A. 87-410.)