Starting out by telling the police about your mental health issues may be the best thing that way it can't be used as ammunition against you later by the party who has already victimized you. This way the police are already aware and can't be blindsided by the suspects they will be going after with the allegation that you are a mentally ill individual who does not know reality from fantasy and whatever other typical BS people say about people like us in order to justify their own bad behavior.