Besides the issue of Williams' guilt or innocence, to me there are two related, but different issues here.
One - I don't believe we should continue to practice the death penalty.
The death penalty is practiced in America in a way that can statistically be shown to be biased. Killing someone white is far more likely to land a person on death row than murdering blacks. While blacks were nearly 47% of this nation's homicide victims from 1976 (the year the U.S. Supreme Court reinstated the death penalty) to 2002, 80% of the victims of the people on death row were white, according to the Death Penalty Information Center.
http://www.deathpenaltyinfo.org/
All but 25 of the 570 whites executed through Oct. 1 had white victims ?- as did 62% of the blacks who were put to death. This suggests that the criminal justice system places a higher value on the lives of white capital crime victims than those of blacks. That's an inequitable and unjust application of the death penalty.
"If you're going to support the death penalty, then you have to be as supportive of its equitable and just application." It wasn't some bleeding heart tree-hugger who said that. It was Richard Land, chairman of the Southern Baptist Convention's Ethics and Religious Liberty Commision, a man who has been quoted as saying he would volunteer to be the one who delivered the lethal injection to John Couey, a man who raped and killed a nine-year-old. Land has pointed out that the poor and people of color are more likely to be executed in this country.
The second issue, IMO, is that we will do harm and no good by killing Stan Williams. There is no good reason not to let this man continue his work in prison. If he can help some kids navigate their way clear of gangs, to me, that's reason enough.