Chicago Police officers are required to fill out a statistical study form when issuing a traffic citation (except traffic crash related) that asks race of driver, vehicle info, and was a search of the driver or passengers or vehicle conducted with or without consent and was any contraband recovered. The officers are also required to fill out a blue statically study card when a warning is issued as opposed to the citation. This practice is conducted throughout Illinois as mandated by law (625ILCS5/11-212).
This years results state the following (via Chicago Tribune)
Minority motorists in Chicago are about five times more likely than whites to undergo a "consent search," in which police at traffic stops ask permission to search vehicles.
Maybe the eggheads at NU should ask this question. What is the likelihood that when a person stopped in a high crime area and fails to produce a valid drivers license that that person isn’t issued any citation at all? I can tell you anecdotally that the numbers are staggering. You see whenever a person is driving without a valid d/l he is suppose to be brought into the station and issued citations along with an I-bond. This is time consuming and would cause a district to come to a complete standstill if there was even a 50% enforcement rate. The statistic gathers can not even fathom all the other variables that should be used in producing these findings.
The department deploys resources, other than district law, to areas of high crime. The higher the crime rate the more likely the area residents are minorities. Now get this straight, I did not say that a minority area necessarily has a high crime rate but that an area with a high crime rate is more likely to be minority. A unit like TRU or units assigned to Operation Safe Summer are sent to high crime, high minority neighborhoods and are going to make more stops of traffic violators than would be done in lower crime areas.
I don’t possess a grant to commission a study, but if I did I'm sure I too would be able to produce statistic that would dazzle you with my bullshit too.