In the early 80s I had my house broken into and 20 something handguns were stolen. The dude was caught trying to sell them to an undercover cop.

The DA had to keep the guns as evidence pending court. At the time I was shooting for the guard and had an up-coming pistol match out of state.

I contacted the DA directly and got her to release the three guns I needed (Hardball 1911, Model 52 Smith, and High Standard Victor) for the bullseye pistol match. She figured she had enough guns left over to get a conviction (which she got).

After the trail, all the guns were returned to me. I even made a deal where she allowed me to go to the property room and "oil up" all the guns so they wouldnt rust up in the evidence locker.

So I'd just go to the DA, be polite, and you'll probably get your gun back.