35-year-old Hector Miguel Diaz-Osuna plead guilty April 14 for the death of a correctional officer during a 2012 prison riot at the Adams County Correctional Center.
The prison riot happened on May 20, 2012.
Several correctional officers were assaulted and one correctional officer died during the riot.
Other correctional officers were held hostage for several hours by the rioters.
The total damage to the facility was estimated to be $1,305,142.00.
Diaz-Osuna will be sentenced on June 16, 2016 by Senior U.S. District Judge David C. Bramlette III and faces a maximum penalty of 15 years in prison.
He was previously convicted of rioting and faces an additional 10 years in prison for that crime.
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