well, it could be that it was a 17-year old driving a bimmer (used, with a lot of miles, but nonetheless) and the cops (in absense of hard crime in the area!!) were bored to death... i try not to argue with the cops in this police state...

rule 1. the police is always right...
rule 2. if the police is wrong, see rule 1!!!

this video clip sums it up!!! hahaha

Weak Constitution - The Daily Show with Jon Stewart - 04/24/13 - Video Clip | Comedy Central