California Death Row Inmate Gilbert Rubio Dies in Prison

California Death Row Inmate Gilbert Rubio Dies in Prison
This 2010 photo provided by the California Department of Corrections and Rehabilitation shows condemned inmate Gilbert Rubio. AP Photo/California Department of Corrections and Rehabilitation
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SAN QUENTIN, Calif.—The California corrections department says a death row inmate has died after being found unresponsive in his San Quentin prison cell.

Guards discovered 55-year-old Gilbert R. Rubio in his one-man cell Thursday around 6 a.m. His cause of death has not been determined.