There are no charges to be filed that I can see in Alaska. The time to address his plural marriage would have been at the time of the divorce then you could have asked that the marriage be annulled.
If by filing charges you mean bringing a criminal complaint, that would be up to the local DA, who might not see such a filing a cost effective use of his/her resources.
Your marriage was invalid if he married you 2nd and had not gotten a divorce from his 1st wife. It was null and void. He committed a fraud but I don't know too many prosecutors' offices which would prioritize your case and file criminal charges against him for fraud.
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