Statistical data demonstrates that although policing practices and policies vary widely across the United States, a large disparity between racial groups in regards to traffic stops and searches exists. Based on academic search, various studies have been conducted regarding the existence of racial profiling in traffic and pedestrian stops. For motor vehicle searches, academic research showed that the probability of a successful search is somewhat similar across races. Similar evidence has been found for pedestrian stops, with identical ratios of stops to arrests for different races. One study concluded that the ratio of different races stopped by New York cops is about the same for all races tested, though other studies have found the rates of stops to be starkly racially differentiated. In a study conducted in Cincinnati, Ohio, it was concluded that "Blacks were between three and five times more likely to (a) be asked if they were carrying drugs or weapons, (b) be asked to leave the vehicle, (c) be searched, (d) have a passenger searched, and (e) have the vehicle physically searched in a study conducted. This conclusion was based on the analysis of 313 randomly selected, traffic stop police tapes gathered from 2003 to 2004." A 2001 study analyzing data from the
Richmond, Virginia Police Department found that African Americans were disproportionately stopped compared to their proportion in the general population, but that they were not searched more often than Whites. The same study found that Whites were more likely than African Americans to be "the subjects of consent searches", and that Whites were more likely to be ticked or arrested than minorities, while minorities were more likely to be warned. A 2002 study found that African Americans were more likely to be watched and stopped by police when driving through white areas, despite the fact that African Americans' "hit rates" were lower in such areas. A 2004 study analyzing traffic stop data from suburban police department found that although minorities were disproportionately stopped, there is only a "very weak" relationship between race and police decisions to stop. Other studies have found that young black and Hispanic men were more likely to be issued citations, arrested, and to have
force used against them by police, even after controlling for numerous other factors. A 2005 study found that the percent of speeding drivers who were black (as identified by other drivers) on the
New Jersey Turnpike was very similar to the percent of people pulled over for speeding who were black. A 2004 study looking at motor vehicle searches in
Missouri found that unbiased policing did not explain the racial disparity in such searches. In contrast, a 2006 study examining data from
Kansas concluded that its results were "consistent with the notion that police in Wichita choose their search strategies to maximize successful searches," and a 2009 study found that racial disparities in people being searched by the Washington state patrol was "likely not the result of intentional or purposeful discrimination." Another 2009 study found that police in
Boston were more likely to search if their race was different from that of the suspect, in contrast to what would be expected if preference based discrimination was not occurring (which would be that police search decisions are independent of officer race). A 2010 study found that black drivers were more likely to be searched at traffic stops in white neighborhoods, whereas white drivers were more likely to be searched by white officers at stops in black neighborhoods. A 2013 study found that police were more likely to issue warnings and citations, but not arrests, to young black men. A 2014 study analyzing data from
Rhode Island found that blacks were more likely than whites to be frisked and, to a lesser extent, searched while driving; the study concluded that "Biased policing is largely the product of implicit stereotypes that are activated in contexts in which Black drivers appear out of place and in police actions that require quick decisions providing little time to monitor cognitions." As a response to the
shooting of Michael Brown in Ferguson on August 9, 2014, the Department of Justice recruited in September a team of criminal justice researchers to study racial bias in law enforcement in five cities and to subsequently devise strategic recommendations. In its March 2015 report on the Ferguson Police Department, the Department of Justice found that although only 67% of the population of Ferguson was black, 85% of people pulled over by police in Ferguson were black, as were 93 percent of those arrested and 90 percent of those given citations by the police. A 2020 study in the journal Nature that analyzed 100 million traffic stops found that "black drivers were less likely to be stopped after sunset, when a ‘veil of darkness’ masks one's race, suggesting bias in stop decisions", "the bar for searching black and Hispanic drivers was lower than that for searching white drivers", and "legalization of recreational marijuana reduced the number of searches of white, black and Hispanic drivers—but the bar for searching black and Hispanic drivers was still lower than that for white drivers post-legalization". The authors concluded that "police stops and search decisions suffer from persistent racial bias and point to the value of policy interventions to mitigate these disparities". A 2016 study found that shootings of police officers by black suspects increased racial profiling of black civilians (but no similar effect for white or Hispanic shooters on profiling white or Hispanic civilians) for a brief period in the immediate aftermath of the shooting. == Racial profiling in retail ==