More than 160 inmates rioted Sunday morning on the main yard at the California Men’s Colony. Following the melee, a 25-year-old prisoner died.
Multiple inmates suffered stab wounds during the riot, which guards suppressed using 40 mm less-than-lethal rounds, as well as chemical agents. A total of nine inmates were taken to the hospital, according to the California Department of Corrections and Rehabilitation.
The riot broke out at 10:53 a.m. on the yard at the medium-security East Facility at the Men’s Colony. At 1:05 p.m., Matthew Cook was pronounced dead at the hospital.
Cook was serving a 13-year, eight-month sentence for first-degree burglary. He arrived at the Men’s Colony in April 2015 from San Joaquin County.
Investigators have yet to determine what caused the riot. Authorities are restricting inmate movement in order to conduct an investigation.
The California Men’s Colony houses a total of 4,169 inmates.