Yes, an officer has to have a valid reason to make a traffic stop. Based on the facts you state, not wearing a seatbelt in Michigan is an offense for which an officer could make a traffic stop. If the officer truly believed that you were not wearing a seat belt, he could stop you to investigate. Also, having something hanging out the back of your car may give sufficient reason to make a stop.
Answered on Aug 13th, 2012 at 2:25 PM