Sheley was the top dog at the Granite City jail. (Of course, he was the only dog since he was the sole inmate.) For our legal eagles, the pleadings can be found here: criminal complaint (PDF)
So why might he have done it? Other than being an animal, his violence could be related to his suspected methamphetamine abuse. Or it could just be he wanted to add to his resume which includes a history of arrests and resisting arrest. Ironically, Sheley's apparently gave up without a fight when police arrested him outside a Granite City bar Tuesday night. Sheley is charged with the murder of an elderly man in Whiteside County, Illinois. Sheley faces another charge from Galesburg, Illinois for first-degree murder of, Ronald Randall, a 65-year-old man. Nicholas Sheley appears to be a suspected in six other killings, including that of a child. Six victims in Illinois, two in Missouri. The vicitims all appear to have died from blunt trauma to the head. Sheley apparently has a history of armed violence and resisting arrest.
Sheley also suspected in the death of an Arkansas couple in Festus, Missouri. The couple was in town for a graduation. Sheley is not believed to have had a prior relationship with the couple. Allegedly, Sheley's ex-wife has told authorities that Seley stated, that "... he has more killing to do." I think it unlikely, unless he plans to do his killing in the fashion field, where jail house orange is the current rage.