You may move in Supreme Court to file late notice so long as it is within one year of the event, but the longer you wait the less likely it will be granted, and you will need good cause. One problem you will have is proving your case, which you will have to prove in criminal court first anyway, namely, that you are the victim, not her. To that end, you may have a difficult time. It is more productive perhaps to concern yourselves with the criminal charge than a potential civil suit against the polcie.
If you found this "helpful" or "best answer," please click it with my appreciation. My response is for educational purposes and does not constitute legal advice nor creates an attorney client relationship which requires all the details and a personal conference.
You may have a claim depending on what happens with the criminal matter. Your friend should focus on his defense of the criminal matter, which could have harsh consequences if he is found guilty.
Former Prosecutor and Family Court Law Clerk. I am available for phone consultations at (914) 368-2646. This answer is very general and is not intended to be specific legal advice and does not create any attorney/client relationship. Please consult an attorney with the specifics of your case to determine your best course of action in or out of court