The U.S. Supreme Court on Monday agreed to consider setting aside a condemned Oklahoma man’s murder conviction that the state’s own attorney general has said was tainted by prosecutorial misconduct, marking another turn in the long legal saga of 25-year death row inmate Richard Glossip.

The high court’s announcement came more than eight months after the justices intervened to pause Glossip’s execution. Unlike most death penalty cases, it was Oklahoma’s chief law enforcement official—Attorney General Gentner Drummond—who had come out in support of calling off Glossip’s execution.