My question involves a marriage in the state of: MS

My spouse forged a refund check during our divorce proceedings for over 1K. I reported it to the police and they took a statement from me but the DA's office but refused to press charges. I was told by the investigator that it was a civil matter. Btw, my spouse just happens to be a attorney practicing in the area. If I'd done this, I can't help but believe that I'd be arrested. What gives????