I had called the ATF Denver office before I called the police. The agent said to get a police case number and if I hadn't heard anything back to give him a call back in a couple months. At this point, I doubt if I ever see my shotgun again, but Mr. Tulowitzki needs to have some federal heat applied to him.
Even if they can't help you directly, I'm sure enough complaints will get a review of his FFL and possibly lead to revocation. This might save others the headaches you are going through. I'd suggest you keep up with it for those reasons.
"Praise be to our prophet, John Moses Browning, who hath bestowed upon us the new testament of shooting. Delivered unto us, his disciples, on 29 March 1911 A.D."