So now Misskelley's confessions and Carson's testimony can be considered when weighing Echols' guilt?
From how I'm interpreting this, the AG is saying that the absence of Echols' DNA from the little bit of biological material tested weighed against the fact that all three murderers confessed would not compel a jury to acquit today
Deep down, Stidham probably knows that he screwed Jessie royally. Stidham advised Jessie to fight the charges, against Jessie's better interests, just so Stidham could have a major role in Paradise Lost and make a name for himself. And that underlying guilt is probably why Stidham will champion this case for the rest of his life.