Knox County Sheriff David Clague says Nicholas Sheley is suspected of unscrewing a railing from his cell in the county jail, taking it to the next cell and swinging it at another inmate Sunday morning.
He says a report has been sent to the Knox County State's Attorney's office, which will determine if charges will be filed. Sheley and the other inmate have been put on 72-hour lockdown.
The 28-year-old Sheley is suspected of bludgeoning eight people to death in late June before he was captured outside a bar near St. Louis. His alleged victims include Tom and Jill Estes of Sherwood.
(Copyright 2008 by The Associated Press. All Rights Reserved.)