The State of Georgia plans to execute Troy Davis at midnight on September 21, even though he is very likely innocent.

Davis has been scheduled for execution three times before, and three times his execution has been stayed amid doubts and new evidence against other suspects. Davis was sentenced on the basis of witness testimony, but seven of nine original witnesses have since recanted or changed their testimony.

We can't afford to execute people who might be innocent – let alone people who probably are.

The last chance for remedy of this egregious injustice is an appeal for clemency to the Georgia Pardons and Parole Board. Clemency in Davis' case does not mean setting him free but instead converting his death sentence to life in prison without parole – that way, if his verdict is ever reversed at least he will be alive to see it.