Frankly he should sue. Nothing major, just legal fees and whatever the fifteen minutes wasted by the cop amounts to in terms of reasonable wages. The cops need to remember we're not here to be pulled over to fill quotas or satisfy their curiosity: every pointless traffic stop is a nuisance to a citizen and should be compensated the same as we're expected to compensate the state for encroaching on their rules.
Unless the dude was swerving all over the place and fiddling with his dashboard...