Washington County Circuit Judge Andrew Gonring has found Beau J. Musial of Richfield not guilty by reason of insanity in the December 2012 murder of his father, Jerome. 38 year old Beau Musial, pleaded no contest in January to a charge of first-degree intentional homicide, and Judge Gonring ruled that he committed the crime. Musial's attorneys then contended he was mentally ill and was not responsible for his actions. Judge Gonring agreed with the defense attorneys at a court hearing Thursday in ruling Musial was not guilty by reason of mental disease or defect. A May 19th hearing has been scheduled to determine whether Musial will be committed to a mental health institution. According to the criminal complaint, on Dec. 21, 2012, Musial called 911 and admitted to killing his 76-year-old father, He had repeatedly punched his father after an argument about Beau Musial's purchase of a tractor-trailer. His father became unconscious after the beating. Musial then grabbed a serrated knife and cut his father's throat using a sawing motion several times. Musial has a prior criminal record of violence against his father. In August 2006, Beau Musial was convicted of misdemeanor battery of his father from an incident May, 2006.