The inevitable result is that the people who wind up in front of a judge are usually guilty of some crime. The parade of guilty people through America’s courtrooms gives the false impression to the public—as well as to judges—that when the police have a “hunch,” it makes sense to let them act on it. Judges tend to imagine the police have a sixth sense—or some kind of special police training—that qualifies them to identify drug criminals in the absence of any evidence. After all, they seem to be right so much of the time, don’t they?

