The main point of his defense is to point out wether or not racial profiling had anything to do with the officers searching his car. A lot of people get nervous when they see police officers, and if a person's hand is shaking when he/she shakes the police officer's hand, I certainly don't think that is a good probable cause for a car search.
If nothing else is obvious to the officers, they should not have searched the car.
But beyond this point, the 73% percent statistic of people who have been searched being minority is not very helpful. I think a better statistic to have is the percentage of the minorities searched that result in arrest. I think that statistic will tell us a lot more about how prevalent racial profiling really is. But I doubt we'll ever get anything like that.
Heifetz