I interpreted Wedrifid's usage of the term "evil" as roughly, "very, very immoral". I would be surprised if anyone would disagree that one has a moral duty to know as much as possible the true facts of a matter before going about destroying someone else due to those facts. So in so far as the Kerchers have failed to know what is going on (completely failed) they have (completely) failed to be moral.
I agree with all that.
See: You Be the Jury, The Amanda Knox Test
While we hear about Bayes' Theorem being under threat in some courts, it is nice to savor the occasional moment of rationality prevailing in the justice system, and of mistakes being corrected.
Congratulations to the Italian court system for successfully saying "Oops!"
Things go wrong in this world quite a bit, as we know. Sometimes it's appropriate to just say "hooray!" when they go right.
Discuss, or celebrate.