Only 250 in the area
Being only a year old, this model was still so brand-new that the owner almost certainly had to purchase it from the manufacturer. Or perhaps there was only one previous owner. Additionally, he discovered that in the state and the states nearby, there were only about 250 brand-new editions sold or available for purchase overall.
Calling dealerships
Davis made a list of every dealership that had sold one of these vehicles in the hopes that one of them had the license plate number in their records. Once they revealed who they had sold the car to, he would finally know who his driver was who was speeding!