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UNIONTOWN, Pa. (AP) – A prison inmate has pleaded not guilty to criminal homicide and other charges in the death of another inmate in Pennsylvania last year.

The (Uniontown) Herald-Standard (http://bit.ly/2fb9HNE) reports that 31-year-old Daysean Brock appeared via video for his formal arrangement Friday before a Fayette County judge.

Authorities allege that Brock assaulted 51-year-old John Steckley in June 2016 at the State Correctional Institution-Fayette. A witness reportedly said Brock blindsided the victim, who hit his head as he fell. Steckley was found unresponsive in his cell the next day and later died.

Assistant Public Defender Shane Gannon entered not guilty pleas to charges of homicide, aggravated assault, simple assault and reckless endangerment.

Brock is currently serving his 24- to 48-year third-degree murder sentence at the State Correctional Institution at Huntington.

(Copyright 2017 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)

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