why not? absent some bombshell piece of evidence we don't know about now, the case appears to stitched together from the facts we have now. and so long as none of those facts exclude him, they can go forward. whats the worst that can happen? he is acquitted.
The worst that can happen is that an innocent man is convicted of this murder because he is strange, deluded, and because everyone in both the Boulder DA's office and the Boulder jury pool want him to be guilty. They are sick of this case and embarrassed at how it was handled from the beginning.
I think barring any strong, compelling evidence against him, Karr is not guilty, but will be railroaded into a guilty verdict.