ostafinShawnPrisonJamestown (CSi) — A man who assaulted a corrections officer at the James River Correctional Center in July will serve an additional eight years in prison.

On Monday, in Southeast District Court in Jamestown 41 year old Shawn Ostafin, pleaded guilty to aggravated assault, a Class C felony,

On July 28, Ostafin was an inmate at the JRCC serving time for the terrorizing conviction. Ostafin hit guard Jeremiah MacDonald, losing consciousness as a result of Ostafin’s assault.

In court Monday, Ostafin testified he thought as he went up to hit MacDonald that MacDonald would defend himself.

Ostafin said he was sorry for his actions and didn’t realize the damage he had done to MacDonald until after the fact.

Ostafin is currently an inmate at the North Dakota State Penitentiary in Bismarck.

Judge Thomas Merrick sentenced Ostafin to serve eight years consecutively at the end of his current sentence for terrorizing.

Ostafin was scheduled to be released on April 22, 2020. With the new sentence, Ostafin will be eligible for release in 2028.

With a Habitual offender status Merrick was able to double Ostafin’s sentence to 10 years in prison.

Merrick said given Ostafin’s criminal history, including convictions in 1990 for murdering his father and stepfather, that he had no problem granting the habitual offender motion.