Rest assured the authorities are quietly gathering enough evidence to slam dunk your husband.
The charges will come and they will be hard, so what I would do is begin gathering as much information on the victim as possible. If she has made false claims in the past I would gather as much information and evidence as possible that clearly indicates this without a doubt, to discredit her as much as I could. The name of the game here is to discredit her
I wouldn’t go to the authorities or provide anything I had found but keep it in a safe accessible place. When I was charged I would enter a Not-Guilty plea and wait in jail until my court date at which time I would let all the information I had gather speak for itself.
You must do all the leg work because a lawyer will not do it as thoroughly as you can. Once you have it and have a lawyer then you can hand the lawyer the evidence for them to work with. The more evidence, names, witnesses and information you can provide the better off you will be.

