Legal Question in Criminal Law in Utah

It depends on what you mean by a "gun case". Depending on the type of case you're referring to, and assuming it's a criminal matter, it's possible to get a conviction or guilty plea expunged provided the required amount of time has elapsed.

You could check on the Court's website and they have papers for expungement. You could review them and see if you qualify. http://www.utcourts.gov/howto/expunge/#District