A Lakemoor man accused of bludgeoning his sister to death in Naperville was found mentally unfit for trial Friday.
Mark Lewis, 53, will be sent to the Illinois Department of Human Services for treatment at a secure facility, according to Will County prosecutors.
Lewis is charged with first-degree murder in the slaying of his 59-year-old sister, Cathleen Lewis, who was found fatally beaten inside her Naperville home in June 2011.
The victim had been hit in the head dozens of times with a hammer or some other blunt object, court records show.
Mark Lewis, who authorities said has a history of paranoid schizophrenia and gambling addiction, is accused of killing her amid a feud over the financial support he received from his family.
Afterward, he withdrew thousands of dollars from his mother's bank account, prosecutors allege, and traveled to Pensacola, Fla., where he was arrested about a month later.
Judge Daniel Rozak found Lewis unfit for trial at a hearing Friday. The case is set for review on April 22.