Oklahoma’s attorney general is asking for the murder conviction of death row prisoner Richard Glossip to be vacated, in a decades-long case in which Glossip narrowly escaped execution three times. In 1997, 19-year-old maintenance worker Justin Sneed killed the owner of a budget motel in Oklahoma. He admitted to the murder but accused Glossip, the motel’s manager, of orchestrating it, allowing Sneed to avoid the death penalty. Glossip has always maintained his innocence. Oklahoma’s attorney general cited evidence in a new report that shows Sneed — who was a heavy drug user at the time of the murder — gave false testimony about his psychiatric condition, and the state’s failure to turn over key evidence. An appeals court must now decide whether to vacate Glossip’s conviction and order a new trial. Glossip is currently scheduled to be executed on May 18.