> To show racial bias you have to show that police are disproportionately targeting blacks relative to the rate of crime, if you make the false assumption that

> To show racial bias you have to show that police are disproportionately targeting blacks relative to the rate of crime, if you make the false assumption that the rate of crime is equal between black people and white people then your conclusions will be wrong. > Even for something like traffic stops, you need to study whether or not black people are more likely to get pulled over because they are black or because they are more likely to be young and therefore more likely to speed. It isn't enough to just say that black people are disproportionately stopped, you have to show that the rate of speeding is the same to show bias. http://washingtonmonthly.com/magazine/janfeb-2014/driving-while-black/ http://washingtonmonthly.com/magazine/janfeb-2014/driving-wh... > The key influence on who is stopped in traffic safety stops is how you drive; in investigatory stops it is who you are, and being black is the leading influence. In traffic safety stops, being black has no influence: African Americans are not significantly more likely than whites to be stopped for clear traffic safety law violations. But in investigatory stops, a black man age twenty-five or younger has a 28 percent chance of being stopped for an investigatory reason over the course of a year; a similar young white man has a 12.5 percent chance, and a similar young white woman has only a 7 percent chance. And this is after taking into account other possible influences on being stopped, like how you drive. Police focus investigatory stops on younger people, and so as people grow older they are less likely to be stopped in this way. But a black man must reach fifty—well into the graying years—before his risk of an investigatory stop drops below that of a white man under age twenty-five. Overall, black drivers are nearly three times more likely than whites to be subjected to investigatory stops. > Being black is also the leading influence on how far police officers pursue their inquisition in investigatory stops. In these stops, full-blown vehicle searches are relatively common. After taking into account other possible influences, black drivers in our survey were five times more likely than whites to be subjected to searches in investigatory stops. Searches are remarkably rare in traffic safety stops, and the driver’s race has no influence on whether the driver is searched in these stops. Fyi, investigatory stops means the cop pulls you over for reasons that don't involve a traffic violation.