You are on patrol running radar and observe an individual speeding. Your radar indicates the suspect is doing 60 in a 35 mph zone. You turn on your lights and pull in behind the suspect's car. The suspect pulls over and brings his car to a full stop while leaving his car running. After you run the plate on the car and everything is O. K., you approach the car on foot. The driver of the car puts down his window and asks why you stopped him. You inform him that he was clocked doing 60 in a 35. You ask to see his license and registration. The driver's breath smells of alcohol and he is slurring his words, so you ask him to step outside the vehicle so you can do a field sobriety test. At the same time you call for back-up. The suspect becomes verbally abusive and refuses to comply. What should you do