Perhaps you can bring suit for slander, libel, defamation of character, etc. and ask for an injunction.
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You should contact the district attorneys office or whatever your local prosecutor is called and ask for their advice. You may be able to have them charged with filing a false report or making false statements to a government agency or even harassment. If criminal charges are not forthcoming, you may be able to sue for harassment and/or defamation.
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