Weather Updates

Brother found unfit for trial in sister’s slaying

Mark R. Lewis

Mark R. Lewis

storyidforme: 46837473
tmspicid: 17331519
fileheaderid: 7817025

Updated: March 27, 2013 12:52PM

A man accused of beating his older sister to death in her Naperville townhome will be in treatment instead of standing trial for her murder.

Mark R. Lewis, 53, of Lakemoor, has been found mentally unfit to stand trial for the murder of his sister, Cathleen A. Lewis, 59.

Will County Judge Daniel Rozak made the determination Friday and ordered that Lewis be turned over to the Illinois Department of Human Services for inpatient treatment.

Cathleen Lewis was found fatally beaten June 8, 2011, in her townhome on the 2300 block of Worthing Drive on Naperville’s south side.

Four days later, police named Mark Lewis a “person of interest” in the theft of his mother’s identity, saying he fraudulently cashed checks on his mother’s account. He was arrested July 19, 2011, in Pensacola, Fla., on a warrant for the identity theft charge.

Authorities charged Lewis with murder in his sister’s death in November 2011.

Court records show Lewis was upset with his mother and sister for cutting him off financially.

Family members described him to police as a “paranoid schizophrenic” and a “degenerate gambler,” court records show. He’d been feuding with Cathleen Lewis since at least March 22, 2011, police said, when she and their mother told Naperville police they found a loaded rifle and maps from his home to Naperville in his Lake County apartment.

Lewis was facing eviction when his mother and sister stopped depositing $300 from his government disability money into his bank account.

The money, which Lewis received because of mental illness, usually would be deposited directly into his mother’s bank account. She would give him $300 on the 5th and 20th of every month.

That ended three days before Cathleen Lewis’ murder. A short time after the murder, records showed checks were written from their mother’s bank account, payable to Mark Lewis.

Their mother denied writing the checks, but police said surveillance video at one bank clearly shows Mark Lewis cashing them.

© 2014 Sun-Times Media, LLC. All rights reserved. This material may not be copied or distributed without permission. For more information about reprints and permissions, visit To order a reprint of this article, click here.