SAN QUENTIN (CBS SF) — Officials at San Quentin State Prison were investigating the death of a condemned inmate following a large outbreak of COVID-19 at the prison.

The California Department of Corrections and Rehabilitation (CDCR) said 71-year-old Richard Eugene Stitely, on San Quentin’s Death Row since 1992, was found unresponsive in his cell Wednesday at 8:38 p.m.

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He was given medical assistance and an ambulance was summoned, but he was pronounced dead about a half-hour later, CDCR said.

Richard Eugene Stitely (CDCR)

There were no signs of trauma and the cause of death and COVID-19 status would be determined by the Marin County Coroner, CDCR said.

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In about three weeks, San Quentin has gone from zero to more than 500 cases of the coronavirus as of Thursday afternoon. It is estimated some 1 in 7 inmates has COVID-19, and the prison currently has the most coronavirus infections of all the state’s prisons, according to data from the CDCR.

The coroner’s office said it now performs COVID-19 tests as part of all forensic examinations.

Stitely was sentenced to death in Los Angeles County for the 1990 rape and murder of Carol Unger, 47, last seen leaving a bar in Reseda with Stitely. Her body was found the next day in a parking lot of a North Hollywood industrial complex.

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There are currently 725 people on San Quentin’s death row. In March of 2019, Governor Gavin Newsom signed an executive order placing a moratorium on executions in Californa, and ordered the closure of the execution chamber as San Quentin.