This is what worries me. If I could be certain of Karr's guilt, then obviously it wouldn't matter. But so far, all the Boulder authorities seem to have done is allow the matter of Karr to spin wildly out of control. If he's innocent of this particular crime, no matter how weird he obviously is, then this piles yet more tragedy on top of an already deeply tragic botched investigation.
It will be interesting to see how all this plays out, but if he is convicted or even tried in a rather unconvincing trial I would be following the trail back to the DA and to her relationship to the Ramseys. Perhaps they're chummy? Not to imply anything, but it would need to be checked out.