Sorry to hear that the AG’s office is also indifferent.
I don’t live in Boulder, so don’t have a handle on local attorneys, but there is this site that may help if no one on the forum can offer a recommendation:
I am surprised that theft is considered a civil case by the police. In all countries, theft is considered at least an administrative case (if the amount of the theft is small), and if the amount is large, it is a criminal case. I am sure that the police should help you with this. But if the police refuses, you can even sue them for that. You should consult a lawyer beforehand. Lawyers today are very much in demand because relations between people are always regulated by law. When I was in the Navy, I was accused of treason. But I did not commit any illegal actions and in order to prove my innocence in court I turned to ucmjdefense.com. These guys are real professionals and thanks to their help I did not go to jail.