I'm starting with two links; this will grow.

How to avoid a false rape claim.

how to respond to the threat of a false claim.

What You Should Do If your Wife or Girlfriend Threatens to Call the Police and Make False Allegations

The Ultimate Relationship Deal-Breaker for Men: False Allegations and Threatening to Call the Police If you are falsely accused

More suggestions from Mr. Custody Coach

I am not offering legal advise; call a lawyer. Keep in mind, though that some lawyers work off the presumption that if there is an abuser, it is a male.

And remember, kids, cops are not your friends.