The jury in the trial of a prisoner accused of killing a fellow inmate could begin deliberating as soon as Friday.
Kevin Bellinger is accused of killing Jesse Harris at the Hazelton Penitentiary in 2007.
A video shown in court shows Bellinger and fellow inmate Patrick Andrews allegedly stabbing Harris 20 times.
Bellinger and Andrews are currently serving life sentences.
Andrews faces the death penalty if convicted in his trial set for next year.
Prosecutors are not seeking the death penalty for Bellinger, but if convicted, Bellinger could lose his chance at parole later in life.