After advocating to free Tennessee grandmother Alice Marie Johnson and winning, Kim Kardashian is now on another case.

Kim tweeted about the story of San Quentin Prison death-row inmate Kevin Cooper – asking California Gov. Edmund “Jerry” Brown to retest DNA evidence in his case. Kevin was convicted of the murders of Douglas and Peggy Ryen, their 10-year-old daughter Jessica and her friend, 10-year-old Chris Hughes, in Chino Hills, Calif., 1985.

He’s claimed his innocence ever since, but many activists are saying that the police tampered with DNA evidence to frame him. The DNA was found on a T-shirt he says he never wore.

In an op-ed on Sunday, New York Times columnist Nicholas Kristof wrote that a survivor of the murders, Joshua Ryen, told investigators the killers had been three or four white men. Even still, cops preferred to focus on Kevin.