It is beyond time for a state prosecuting authority to begin its own investigation. There are a significant number of crimes involved in the persecution of American citizens, and not all of them, maybe a minority of them, are the exclusive province of federal authorities. It is a state crime to conspire to violate the civil rights of the citizens of a state, and a state crime to spoil evidence involved in such a crime. It is time for the State Attorney Generals of Texas, Mississippi, Tennessee, Arkansas, Arizona, and Wisconsin, and any others who care about the rule of law in the United States, to begin their investigations and haul these IRS people and their IT people into grand juries.
Is there a federal law that prevents crimes committed by federal employees from being prosecuted by states? I'm not aware if there is.
One problem is it’s the IRS. Much of their information cannot be released to people outside the agency and it’s a federal felony to disclose it. That allows them to hide as much as they want. It would be a very high wall to climb and you know the IRS would retaliate in the future.