A former New York State Department of Corrections officer has been found guilty and two others were acquitted in the killing of Robert Brooks , an inmate at an upstate prison.

David Kingsley was found guilty of murder and manslaughter. He'll be sentenced on Dec. 15. He faces 25 years to life in prison.

Matthew Galliher and Nicholas Kieffer were acquitted of all charges against them.

Brooks was beaten to death last December at Marcy Correctional Facility, about 180 miles northwest of New York City. He had been transferred to Marcy from a nearby lockup, and was dead within an hour of his arrival. The incident was caught on body-worn cameras. Those videos triggered widespread outrage .

Brooks was serving a 12-year sentence for assault after he was convicted of stabbing is girlf

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