Why was an Illinois inmate imprisoned with a man who said he likes to kill?

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http://www.chicagotribune.com/news/local/chi-menard-murder-04-may05,0,4801532.story

Illinois prisons: Low-level inmate is killed by cellmate with violent past when Illinois prison officials OKd housing them together

Prison-reform advocates call for an investigation after Chicago Tribune finds what prison experts call a fatal mistake

By Gary Marx | Tribune reporter
May 5, 2009

Joshua Daczewitz was a first-time inmate at a minimum-security prison when he tested positive for cocaine.

So corrections officials transferred the pudgy, bespectacled Daczewitz to one of the state's toughest prisons as punishment and put him in a cell with Corey Fox, a lifer in for murder.

That turned out to be a fatal mistake.

With a history of violence even behind bars, Fox had been locked up alone for a year not long after pummeling and threatening to kill a cellmate and confessing to his desire to kill again. Yet after Fox was transferred to Menard Correctional Center in late 2003, several staffers at the maximum-security prison cleared him to share a cell with Daczewitz.