That seems like relevant information, though.

Three drops of Veritaserum, requiring her to volunteer all relevant information, had caused Hermione Granger to confess that she had stunned Draco Malfoy from behind, and then, in a fit of anger, cast the Blood-Chilling Charm on him, with the deliberate intention of killing him slowly enough to evade identification from the Hogwarts wards

Yes, but we have now found a thread that we can pull on to start establishing a true map. The truth is entangled- so then we find the student whose wand was stolen, or we start testing the wands of our prime suspects. At the very least, we have introduced an inconsistency in the story- when would Hermione have had the chance to steal a wand? Draco called this dual- are we to now believe that Hermione showed up believing she would be defeated and stole a wand in advance, so she could kill Draco? I don't know if this is enough to forestall the vote, but it certainly is an avenue curiously absent from Harry's thoughts, especially when he is so focused on trying to prove Hermione's innocence- if his Super Dark Side can find this in his memory, I find it hard to believe it would not be of use.