WHEATON, Ill., Sept. 21 (UPI) -- A Dupage County jury Wednesday found a Carol Stream, Ill., man guilty of stabbing his mother to death over a fight for Avril Lavigne concert tickets.
Robert Lyons, 39, was found guilty of first-degree murder in the March 14, 2008 murder of Linda Bolek, 61, the Chicago Tribune reported. Lyons doused his mother's body with household cleaners after stabbing her nine times in the back.
"The defendant was washing something away," Assistant State's Attorney Amanda Meindl told the jury during her closing arguments. "He was washing away the problem in his life, his mother."
Lyons reportedly was angry his mother would not call a friend to obtain tickets to the Lavigne concert, the newspaper said.
The jury determined Lyons exhibited wanton cruelty, making him eligible for life in prison. Sentencing is scheduled for Nov. 22.