One Test Could Exonerate Him. Why Won't California Do It?
"Soon sheriffs deputies were swarming all over the Ryen house in affluent, suburban Chino Hills, east of Los Angeles, that day in June 1983. Several signs, including Joshs personal account, pointed to three white attackers, and blond or brown hairs were found in the victims hands, as if torn off in a struggle.
Sheriffs deputies were also contacted by the woman whose boyfriend was a convicted murderer, recently released from prison, whom she suspected of involvement in the Ryen killings. She not only gave deputies his bloody coveralls but also told them that his hatchet was missing from his tool rack and resembled one of the weapons reportedly used in the attacks.
But instead of testing the coveralls for the Ryens blood, the deputies threw them awayand pursued Cooper. After a racially charged trial, he was convicted of murdering the Ryens and Chris Hughes and is now on death row at San Quentin Prison..."
Much more: https://www.nytimes.com/interactive/2018/05/17/opinion/sunday/kevin-cooper-california-death-row.html?action=click&module=Ribbon&pgtype=Article