SANTA ANA, Calif.—Orange County prosecutors released a memo Sept. 27 stating that no one was criminally liable in the COVID-19 death of a jailed murder defendant in January. In a letter to Orange County Sheriff Don Barnes dated Aug. 30, but publicly released Monday, Senior Deputy District Attorney Cyril Yu said, “There is no indication that [the sheriff’s department] failed to perform a legal duty that resulted in [Ah Le] Fang’s death.” Yu’s review of the case showed that Fang repeatedly refused medical care, including medication for schizophrenia. Fang was in custody awaiting trial on charges of fatally stabbing his 50-year-old mother, Lu Thao, and wounding her 75-year-old boyfriend. Fang was charged with murder and attempted murder for the Aug. 15, 2017, attack. Fang’s mother called Fullerton police to report she was being attacked, police said. Officers who arrived on scene found the victim outside her apartment complex at 134 …