The State of Missouri executed Marcellus “Khalifah” Williams on Tuesday night despite knowing he was most likely innocent of the crime he was condemned for.

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.