Nearly three years after thieves stole $645 million in pandemic unemployment benefits from Washington state, investigators are still clawing back funds frozen in fraudsters’ bank accounts. On Friday, the state Attorney General’s Office filed a motion demanding Bank of America forfeit $9.3 million left there by criminals who scammed Washington’s unemployment system in 2020. It’s the largest fraud-related forfeiture sought by the office, which already has filed 17 similar actions against financial institutions that appear to have been repositories of looted jobless benefits. “My office remains f…