NEW YORK (AP) — Newly released video of a fatal New York prison beating shows correctional officers repeatedly pummeling a handcuffed man, striking him in the chest with a shoe, and lifting him by the neck and dropping him.

Body camera footage of the Dec. 9 assault on Robert Brooks was made public Friday by the state’s attorney general, who is investigating the officers’ use of force.

Brooks, 43, was pronounced dead at a hospital the morning after the assault at the Marcy Correctional Facility, a state prison where was incarcerated in Oneida County.

Thirteen correctional officers and a nurse implicated in the attack will face termination, according to New York Gov. Kathy Hochul, who said she was “outraged and horrified” by videos of the “senseless killing.”

The footage made public Friday shows correctional officers repeatedly punching Brooks in the face and groin as he sits handcuffed on a medical examination table.

As one of the officers uses a shoe to strike Brooks in the stomach, another yanks him up by his neck and drops him back on the table. The officers then remove the man’s shirt and pants as he lies motionless and bloodied on his back.