I don't know a lot about the specifics of these cases, but in general, I come down on the side of making it more difficult for people to be in prison. The criminal justice system should err on the side of letting guilty people go free rather than on the side of innocent people being imprisoned. Anything that provides an avenue for an innocent person to go free should be weighted positively pretty heavily.
Also, the death penalty needs to be eliminated. These cases further illustrate the need for this.