Do not provide a written or recorded statement that will be used against you in court.
Remember that everything you say and any act you do may be memorialized by the police in the police report that will be written. Do you have to speak to them? No. Should you? It depends. If you were not the aggressor then you may choose to speak to them. Show the police the marks on you, the damage to the items of personal property, the walls. If you committed the acts you should be circumspect and invoke your constitutional right to be silent. Do not provide a written or recorded statement that will be use against you in court. Most people have a bad moment in their life when but for that one small lapse of judgment they could not subject themselves to the often overzealous actions of the police, the prosecutor and the court system. When your personal relationship with your partner is deteriorating, try your best to become objective and look out for yourself.