Join Expunge.io in the Knight Foundation Village on the Midway. In 2012, over 25,000 youth were arrested in Cook County, Illinois. Approximately 85% of juvenile offenders are eligible to have their juvenile records expunged when they turn 18. However, in 2012, only 70 youth filed for expungement (and of those applicants, all 70 youth were approved to have their record expunged). The Mikva Challenge Juvenile Justice Council collaborated with Smart Chicago, Cathy Deng and LAF to create Expunge.io, a web app to help youth navigate the expungement process.