If the average person is illegally searched, but turns out to be innocent, what are the chances they bother to take the police to court? It's not like they're going to be jailed or convicted, so many people would prefer to just try to move on with their life rather than spend thousands of dollars litigating a case in the hopes of a payout that could easily be denied if the judge decides the cops were too stupid to understand the law rather than maliciously breaking it.

Because of that, precedent is largely going to be set with guilty parties, but will apply equally to violations of the rights of the innocent.