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At Bloom Trail High School in Chicago’s south suburbs, the student body is diverse: About 60% of the 1,100 students are Black or multiracial. Another 27% are Latino. And 12% are white.

But when you look at the group of students who get ticketed for misbehavior at school, the diversity vanishes.

Police, in cooperation with school officials, have written 178 tickets at the school in Steger since the start of the 2018-19 school year. School district records show that six went to Latino students. Five went to white students. And 167 went to Black or multiracial students — 94% of the total.

Such racial disparities in ticketing are part of a pattern at schools across the state, an investigation by ProPublica and the Chicago Tribune has found. In the schools and districts examined, an analysis indicated that Black students were twice as likely to be ticketed as their white peers.

Reporters set out to analyze police ticketing in nearly 200 districts throughout Illinois, which together enroll most of the state’s high school students. Most local officials either did not specify race on tickets or refused to provide the information, but the news organizations obtained documentation of the race of students for about 4,000 tickets issued at schools in 68 districts.

After excluding places where ticketing was rare, schools in 42 districts remained, representing more than one-fifth of the state’s high school students. The analysis found that about 9% of those students are Black but nearly 20% of tickets went to Black students.

Analyzing tickets received by members of other racial or ethnic groups is more difficult, in part because the Tribune and ProPublica identified anomalies in the way school districts and police recorded information about white and Latino students. But students in those groups don’t appear to have been ticketed at high rates compared to their share of school enrollment.

Student ticketing in Illinois, or any other state, has never been examined on this scale. In fact, while Illinois officials have focused on whether schools are suspending or expelling Black students in unequal ways, they have not monitored police ticketing at schools. Neither has the division of the U.S. Department of Education that oversees civil rights issues.

The first installment of the Tribune-ProPublica investigation “The Price Kids Pay” detailed how student ticketing flouts a state law meant to prevent schools from using fines to discipline students. The investigation, which was based on school and municipal records from across the state, documented at least 11,800 tickets during the past three school years. It found that schools often involve police in minor incidents, resulting in harsh fines, debt for students and families and records that can follow children into adulthood. (Use our interactive database to look up how many and what kinds of tickets have been issued in an Illinois public school or district.)

In response, Illinois’ top education official told school leaders to “immediately stop and consider both the cost and the consequences of these fines,” and Gov. J.B. Pritzker said conversations already were underway with legislators “to make sure that this doesn’t happen anywhere in the state of Illinois.” Rcode-1232

Illinois lawmakers tried in the past to pass legislation that would require school districts to collect and share student race and ethnicity data compiled by police when they intervene at schools for all types of disciplinary reasons, including such minor offenses as tobacco possession, tardiness or insubordination. But those efforts have stalleouse Speaker Emanuel “Chris” Welch, a Democrat, said the legislature should take action if school ticketing is harming students.