In the aftermath of Williams’ execution there has been an outcry from the public due to the doubts over his conviction, especially since it was reported in August that a new development showed that the knife used in the murder was believed to have been contaminated by DNA from a prosecutor and investigator working on the case.

Marcellus Williams had always maintained that he had nothing to do with the stabbing death of a former St. Louis Post-Dispatch reporter. State and federal courts rejected numerous last-minute requests to halt the execution and review the case.

Marcellus Williams was backed in his appeals for clemency by St. Louis County Prosecuting Attorney Wesley Bell.

The execution came despite one of the prosecutors in the case saying that Williams' life should be spared because DNA did not connect him to the case.

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.

Missouri will execute an innocent man, Marcellus 'Khaliifah' Williams, said Williams' attorney, Tricia Rojo Bushnell.

Marcellus Williams was convicted in the 1998 stabbing death of Felicia Gayle in Missouri, but DNA testing raised questions.