A Salinas Valley State Prison inmate who stabbed, beat and strangled his cellmate to death was sentenced to 141 years-to-life in prison on Friday.

In January, a jury found Brandon Scott Keen, 33, guilty of murdering Dimitris Kalatzakis, 31.

Following the verdict, Keen, who had been calm throughout the trial, reacted, Monterey County Deputy District Attorney Brian Jones said.

More:Outburst in court follows Salinas Valley inmate's murder conviction

"After being found guilty of murder, Keen turned around in court and yelled to the Kalatzakis family that he would never apologize for his actions," Jones said.

Keen yelled out in open court and in front of the victim's family that he had "No regrets," and that he "loves it" and "wants more of it," Jones said.

On Oct. 4, 2013, Keen alerted correctional officers that his cellmate was "down," according to the Monterey County District Attorney's Office. Keen was serving a 25-year prison sentence for mayhem. He also has previous convictions for arson and assault with a deadly weapon.

Officers found Kalatzakis lying face up in a large pool of blood, and the cell walls were covered in blood spatter. He died at the scene.

Kalatzakis was stabbed six times with an inmate-manufactured weapon, an autopsy found. He also was beaten so badly there were broken bones all over his face, and he was strangled to death.

Guards never found the weapon, prosecutors have said. Keen and Kaatzakis had only been cellmates a few weeks. Officials never identified a motive for the attack.

At trial, Keen took the stand. He testified that Kalatzakis had attacked him with some type of weapon and they fought. Keen told the court he had blacked out and couldn't remember what happened after the incident.

But the evidence didn't support Keen's account, Jones said, since Kalatzakis had just gotten a tooth pulled and been given medication, making it unlikely he would start a fight.

In addition, the only injury Keen suffered was a cut to his ring finger's knuckle, which doctors said likely came from punching Kalatzakis, Jones said. He had no medical history of blacking out.

Kalatzakis, who was serving a sentence for carjacking, had been scheduled for release in October 2015, prosecutors said.

The jury also found that on Aug. 31, 2016, Keen fought with another inmate. Mathew Jennings, 46, was attacked in the day yard when correctional officers fired tear gas to stop the fight. Jennings fell to the ground with his back to Keen.

Keen used a weapon made out of a toothbrush with two razor blades to get on top of Jennings and slash his face and neck.

Keen was sentenced under the state's Three-strikes law.

Chelcey Adami is the local editor of The Salinas Californian. Contact her at cadami@thecalifornian.com or 831 277-8763. Support work like this by subscribing here.