An inmate of the U.S. Medical Center for Federal Prisoners in Springfield, Mo., was sentenced in federal court Wednesday for assaulting another inmate.

Dean Kinningham, 52, was sentenced by U.S. District Judge M. Douglas Harpool to 12 years and seven months in federal prison without parole, to be served consecutively to his previously imposed sentence.

On June 17, 2015, Kinningham pleaded guilty to assault with the intent to commit murder. Kinningham admitted that he assaulted another inmate, Gary Brown, by stabbing and slashing him with a razor blade on June 4, 2014. Prison officials responded to an emergency call in the prison ward and discovered Brown with multiple lacerations on his face and neck. Kinningham, who had blood on his shirt, was also present. Kinningham stated that “this is all me,” referring to the blood in the hallway and on his clothes. Brown was treated on the scene and transported to a local Springfield hospital for treatment.

Kinningham is currently serving a 262-month sentence for armed pharmacy robbery and brandishing a firearm during a crime of violence for the Eastern District of Tennessee, with a release date of May 17, 2030.