Can I file a case against my ex-husband for opening credits cards in my name with out my knowledge.. the cards are now maxed out and in default.

The accounts were opened while we were still married but not living together.. I found out this week when I pulled up my credit report.. I contacted them and found out that he was an authorized user. Both accounts are maxed out and one is in collections. I tried to file a police report as the credit card company advised me to so, but the police said it's a civil case and not a criminal case. They did advise me to purse it as I have to pay him Alimony and he basically committed a crime against me.. Is there anything I can do.