Show the police any injuries, bruises or damaged property. Visible proof provides more facts the police will take into consideration. Tell the officers if there were any witnesses. They help validate the fact that something has taken place. Tell the officers about other violent incidents.
Past abuse is part of an abusive pattern.
Previous assaults help explain the danger involved in your situation. Show the officers any court documents you have, such as a Protection Order. In particular, keep a certified copy of a Restraining Order or Protection Order with you at all times. Ask the officers for their business card, case number of the report and a phone number. Call the officers with any concerns or questions while the incident is being investigated.