There can be no lawsuit against a person filing a police report in good faith, even if in error. There can be liability for filing an intentionally false police report.
The above is general legal and business analysis. It is not "legal advice" but analysis, and different lawyers may analyse this matter differently, especially if there are additional facts not reflected in the question. I am not your attorney until retained by a written retainer agreement signed by both of us. I am only licensed in California. See also avvo.com terms and conditions item 9, incorporated as if it was reprinted here.
I agree with Mr. Doland; as long as the police report was filed in good faith, you likely have no case.
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