a lot of charges for quite a while. What happens to him is he gets charged with eight offenses in the Ferguson Municipal Code and tries to fight his case. He ends up, he was arrested on that occasion. He ends up losing his job where he was a contractor for the federal government. That arrest really derailed him.
Mike’s arrest is a carbon copy of Sandra Bland’s, isn’t it? A police officer approaches a civilian on the flimsiest of pretexts, looking for a needle in a haystack—with the result that so many innocent people are caught up in the wave of suspicion that trust between police and community is obliterated. That’s what was being protested in the streets of Ferguson: years and years of police officers mistaking a basketball player for a pedophile.2
Is this just about Ferguson, Missouri or Prairie View, Texas? Of course not. Think back to the dramatic increase in traffic stops by the North Carolina State Highway Patrol. In seven years they went from 400,000 to 800,000. Now, is that because in that time period the motorists of North Carolina suddenly started running more red lights, drinking more heavily, and breaking the speed limit more often? Of course not. It’s because the state police changed tactics. They started doing far more haystack searches. They instructed their police officers to disregard their natural inclination to default to truth—and start imagining the worst: that young women coming from job interviews might be armed and dangerous, or young men cooling off after a pickup game might be pedophiles.
How many extra guns and drugs did the North Carolina Highway Patrol find with those 400,000 searches? Seventeen. Is it really worth alienating and stigmatizing 399,983 Mikes and Sandras in order to find 17 bad apples?
When Larry Sherman designed the Kansas City gun experiment, he was well aware of this problem. “You wouldn’t tell doctors to go out and start cutting people up to see if they’ve got bad gallbladders,” Sherman says. “You need to do lots of diagnosis first before you do any kind of dangerous procedure. And stop-and-search is a dangerous procedure. It can generate hostility to the police.” To Sherman, medicine’s Hippocratic oath—“First, do no harm”—applies equally to law enforcement. “I’ve just bought myself a marble bust of Hippocrates to try to emphasize every day when I look at it that we’ve got to minimize the harm of policing,” he went on. “We have to appreciate that everything police do, in some ways, intrudes on somebody’s liberty. And so it’s not just about putting the police in the hot spots. It’s also about having a sweet spot of just enough intrusion on liberty and not an inch—not an iota—more.”
That’s why the police officers involved in Sherman’s Kansas City experiment underwent special training. “We knew that proactive policing was a legitimacy risk for the police, and I stressed that repeatedly,” Sherman said.3 Even more crucially, this is why the Kansas City gun experiment was confined to District 144. That’s where the crime was. “We went through the effort of trying to reconstruct where the hot spots were,” Sherman said. In the city’s worst neighborhood, he then drilled down one step further, applying the same fine-grained analysis that he and Weisburd had used in Minneapolis to locate the specific street segments where crime was most concentrated. Patrol officers were then told to focus their energies on those places. Sherman would never have aggressively looked for guns in a neighborhood that wasn’t a war zone.
In District 144, the “Mike and Sandra problem” didn’t go away. But the point of confining the Kansas City gun experiment to the worst parts of the worst neighborhoods was to make the haystack just a little smaller, and to make the inevitable trade-off between fighting crime and harassing innocent people just a little more manageable. In an ordinary community, for the police to be as aggressive as Sherman wanted them to be would be asking for trouble. On the other hand, to people suffering in the 3 or 4 percent of streets where crime is endemic—where there might be as many as 100 or even 200 police calls in a year—coupling theory suggested that the calculus would be different.
“What happens in hot-spots policing? You tell the police, ‘Go on the ten streets out of the one hundred in that neighborhood, or out of a thousand in that neighborhood, and spend your time there.’ That’s where things are happening,” Weisburd says. “And if you do that, there’s a good