There are four fired cops looking for revenge on her. Lots of guys have been exposed to the IRS by jilted wives and girlfriends. IOw they were getting away with cheating on taxes until a vengeful gf or wife swung into action.
More than just four fired cops. Add in all their friends. Also add in anybody who feels the same way as the fired cops, or who has said similar things in what he thought was a private conversation.
If she continues as a cop, she should not count on backup if she ever calls for help.