Here is what the cops should tell her: “Here’s the deal. We will investigate your ‘hate crime.’ However, if it turns out that it is a HOAX, we will charge you $1000 per hour for every hour we spend investigating this. So do you want to tell us the TRUTH know or do you have very deep pockets?”
I’d prefer a law which requires the perpetrator of such a hoax get double the prison sentence that a person found guilty of the claimed hate crime would receive.