Actually because Joanne decided to bully trans women and then threaten the police with her Harry potter money, she's technically created a legal precedent for not enforcing the law specifically when it comes to trans women. As the police publicly stated that they didn't believe a crime has been committed.
But that's actually one of the reasons they avoided putting her up there. Better to set precedent using someone who can't throw all the money at a lawyer. Stops the rich from buying a precedent.
Its horrid that that level of politicking is even relevant in crime like this, but it is, so its good she's not the precedent. Need to set that precedent then get back to her next criminal act.