A son stabbed his mother to death and poured chemicals over her body after she refused to buy him tickets to an Avril Lavigne concert, a jury was told.
Robert Lyons, 39, is facing possible life in prison after being found guilty of first degree murder.
Angry that his mother, 61-year-old Linda Bolek, wouldn't call a friend to arrange concert tickets, Lyons stabbed her nine times in the back and then doused her with insecticide and drain cleaner.
Mrs Bolek was found later on March 14, 2008, lying on the floor of the condo she shared with her boyfriend and her son.
'The defendant was washing something away. He was washing away the problem in his life, his mother,' Assistant State's Attorney Amanda Meindl told a DuPage County court in Chicago yesterday.
During the week long trial, prosecutors said mother and son had one or two flare-ups a month. Lyons had planned to kill Mrs Bolek for some time, the jury heard.
Holding up two photographs one of the victim smiling and an another of her lying face down in a pool of blood and chemicals Ms Meindl said it was important to send a message to Lyons.
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