CHICAGO — The killing of CTA janitor Julian Mobley at the Damen Green Line station has brought renewed attention to how electronic monitoring and arrest warrants are handled while criminal cases are pending. Prosecutors say Chevazz Campbell attacked Mobley last Thursday, Oct. 8, after the janitor encountered him trying to pass through a station turnstile without paying. Campbell allegedly sprayed Mobley with mace, chased him outside and stabbed him repeatedly. Campbell is charged with murder; the allegations have not been proven in court. Campbell had been released on electronic monitoring while awaiting trial on a theft charge, according to court records. He missed several court hearings, and a judge issued arrest warrants. The chief judge’s office said multiple warrants were issued; the sheriff is responsible for enforcing them. The sheriff’s office prioritizes people charged with violent crimes, while Campbell’s most recent case involved theft. Court records show Campbell has seven prior felony convictions, including aggravated battery. In one earlier case, he was convicted of stabbing a 17-year-old girl he did not know, reportedly over space on a sidewalk, and served prison time. The killing has prompted calls for action from transit workers and local officials. Pennie McCoach, president of Amalgamated Transit Union Local 308, said condolences and promises were not enough and called for immediate steps to protect CTA employees. Ald. Jim Gardiner, whose 45th Ward is on the Northwest Side, criticized the city’s emphasis on addressing the root causes of crime, arguing that immediate public safety concerns also need attention. Electronic monitoring is used for defendants facing a range of charges. A review of records cited in the investigation found 15 people charged with murder, 35 charged with attempted murder and 90 accused of being felons in possession of a weapon were on electronic monitoring. Those figures do not establish that monitoring or Illinois’ cashless bail law caused Mobley’s death. Statewide statistics show no increase in defendants committing new crimes or failing to appear in court since the cashless bail law took effect, though individual cases can raise questions about how the system responds to missed hearings and outstanding warrants. Mayor Brandon Johnson’s office said the administration remains committed to safety for CTA riders and employees and noted that homicides on the transit system are down 71% year to date. For Mobley’s family and coworkers, his death has intensified demands for practical protections for the people who keep Chicago’s public transit running.