What can I do about a former caregiver?

This caregiver I'll call CARRIE was terminated from me because she wanted to involve me in some illegal acts of fraud ; using someone else food stamps (which I don't use), sign time sheet with rubber stamp (Medicaid wants actual signature) she claims Medicaid allows signature stamp. I fired her Wed. before she got here asked her not to come, she told her employer she needed my signature for Wed because she was here and I didn't sign, I called the employer that wednesday and told him to tell not to come....in short everything she does is fraud plus she has a felony...any ideas