( CNN ) -- Condemned serial murderer Richard Ramirez , known as the `` Night Stalker '' to the Californians he terrorized in the 1980s , died of cancer , according to coroner 's findings released Monday . Ramirez had been sentenced to death for 13 murders , five attempted murders , 11 sexual assaults and 14 burglaries in the spring and summer of 1985 . He died earlier this month of complications from B-cell lymphoma in a hospital in Marin County , outside San Francisco , at age 53 , the county sheriff 's department reported . A self-professed Satan worshiper who inflicted physical and emotional pain on his victims in myriad ways , Ramirez told the court that sentenced him to death , `` I am beyond good and evil . I will be avenged . Lucifer dwells in us all . '' He died on June 7 , the 59th California inmate to die of natural causes while awaiting execution . Most of his victims were in Southern California , though two of those killed were in the San Francisco area . He was arrested after residents of an east Los Angeles neighborhood spotted him trying to steal two cars , caught and subdued him , then held him down until police arrived . The rest of his life was spent at the home for many of California 's most dangerous felons , San Quentin State Prison , which sits like a fortress along the bay just north of San Francisco .
Serial killer Richard Ramirez died of lymphoma , coroner finds . He was dubbed `` Night Stalker '' for breaking into houses overnight and attacking victims . He had been sentenced to death for 13 murders , 11 sexual assaults and other crimes .