United States Penitentiary,
Atwater (USP Atwater) is a federal prison in the United States. Located in a former portion of Castle Air Force
Base near the city of Atwater in unincorporated Merced
County, California, it is 130 miles from San Francisco.
USP Atwater is a high security facility housing adult male
offenders. The institution also includes a minimum security
On June 20
Rivera, aged 22, was pronounced dead at a local Merced County
hospital from wounds received when he was assaulted
. An investigation has been initiated by the
Bureau of Investigation.