(MSN) J.C.X. Simon—one of the so-called "Zebra Killers" convicted of multiple murders of white San Franciscans in the 1970s—has died, prison officials said Friday.
Simon, 69, was pronounced dead at San Quentin prison at 11:59 p.m. Thursday after being found unresponsive in his cell, Department of Corrections and Rehabilitation officials said. The cause of death is unknown pending the results of an autopsy.
Simon entered the prison system on March 30, 1976, to serve a life sentence with the possibility of parole. He was convicted in San Francisco County of two counts of first-degree murder, conspiracy to commit first-degree murder and assault with a deadly weapon.
Advertisement - story continues below