Three cases remain before the U.S. Supreme Court. One was brought by St. Louis County prosecutors, who do not support Williams’ conviction or upcoming execution.

The office that prosecuted Marcellus Williams wants his murder conviction overturned. The family of the woman he’s accused of killing supports a life sentence instead of the death penalty. But the Missouri inmate is scheduled to be executed tonight – unless the Supreme Court intervenes.

Missouri is set Tuesday to execute Marcellus Williams, a death row inmate whose case has spurred several efforts to save his life amid doubts about the evidence presented at his 2001 murder trial and the actions of a trial lawyer in the case.