In ‚ÄúBetrayed,‚Äù Tribune reporters for the first time quantified the staggering prevalence of sexual violence against students in a large U.S. school district. Using confidential records, innovative data analysis and sensitive interviews with young people, the team discovered and verified 523 times when police investigated a case of sexual assault or abuse of a child inside a Chicago public school in the last decade. Reporters told the wrenching stories of young victims and uncovered child-protection failures that extended from neighborhood schools to the district's downtown offices and the state capital. For years, media outlets attempted to measure the problem of sexual violence against students by examining the cases of disciplined educators or those convicted of crimes. But those efforts failed to account for cases where students are abused by peers or the adult abuser was not punished. By pursuing crimes against students that were documented in police records, the Tribune shed light on a hidden injustice. The reporting proved to be a catalyst for change, leading to massive reforms by district officials, 12 state reform bills and enforcement efforts by the U.S. Department of Education's Office for Civil Rights.