A convicted murderer was sentenced for the killing of another inmate behind bars. Mohamed Abdulkadir will spend life in prison for his latest murder conviction. In court on Thursday, he was also sentenced to 15-25 years for use of a weapon to commit a felony.

He was recently convicted in the murder death of Michael Grandon in 2011.n Both men were behind bars at the Nebraska State Penitentiary at the time of the deadly attack.

During the trial, the defense argued Grandon brought the knife to the fight and Abdulkadir acted in self defense.

A witness had testified that he saw Grandon start the fight by punching Abdulkadir, then reached into his pocket to pull something out. He said both men reached for the item Grandon pulled out and wrestled for it. He couldn't tell what the item was but knew it was a weapon because of Abdulkadir's reaction. After the struggle, he saw Grandon taken away from the area on a gurney.

Abdulkadir was serving 25 to 50 years for aiding and abetting second degree murder in Grand Island dating back to 2009.

Grandon had been convicted of two murders in North Platte from 2007.

Abdulkadir will served his newest terms consecutively.