There’s trouble in Tucson — and his name is Clarence Dupnik.

It seems a dispute with prosecutors has finally forced the office of the worst sheriff in America to stop publicly undermining the case against shooting suspect Jared Loughner.

Here’s the brief, but telling, press release from the Pima County Sheriff’s Office:

Local Tucson TV station KGUN reports:

The statement put an end to an interview by Sheriff’s Bureau Chief Richard Kastigar that had been scheduled for just 45 minutes later, at 1:00 PM. Kastigar had agreed to come to KGUN9’s newsroom to discuss security video recorded in the Safeway parking lot the morning a deranged gunman opened fire, killing 6 people and wounding or injuring 14 others, including Congresswoman Gabrielle Giffords. CNN had booked a live interview with Kastigar, to be conducted by journalist Wolf Blitzer.

The federal government is prosecuting accused gunman Jared Lee Loughner only on those charges related to his actions against victims who were federal employees. It will be up to County Attorney Barbara LaWall to decide when, and whether, to prosecute Loughner on charges related to the other victims.

The word “controversy” contained in the statement would seem to imply some sort of disagreement or discord between the Sheriff’s Department and the office of County Attorney Barbara LaWall. But the statement did not elaborate about the nature of the controversy. When contacted by KGUN9 News, LaWall’s office declined to comment.

It’s all Rush Limbaugh’s fault!