The mayor insisted they were racist and eventually won his battle to cancel the contract and have them all removed. JB Pritzker and Chicago Mayor Brandon Johnson following the arrest of a repeat offender accused of setting a woman on fire aboard a Chicago Transit Authority train. The Cook County State's Attorney's Office and the Chicago Transit Authority are launching a new public awareness campaign warning that prosecutors will seek pretrial detention for people accused of committing violent crimes on public transit. The Cook County State's Attorney's Office will prosecute and seek pretrial detention for all violent offenses on public transit." Chicago's new solution to crime: Signs on the CTA that say violence is illegal.