The fatal stabbing of CTA janitor Julian Mobley at the Green Line’s Damen station has renewed calls from transit workers for changes to safety across Chicago’s rail and bus system. Mobley, 41, was killed Thursday, Oct. 8, after an argument at the station, according to the account of the incident. Chicago police announced Sunday that Chevazz Campbell, 37, had been charged in connection with the killing. Campbell is accused of stabbing Mobley and fleeing the scene. Union leaders said the charges are welcome but do not address what they describe as broader safety problems for transit employees and riders. Penny McCoach, president of Amalgamated Transit Union Local 308, said workers who keep the system operating should be able to return home safely. She called for immediate action, saying condolences and promises alone were insufficient. The unions are seeking repairs at stations, additional measures to address fare evasion and a dedicated police force for the CTA. They say a September City Council agreement to increase funding for Chicago Police officers volunteering for off-duty transit patrols—from $30 million to $75 million—does not go far enough. Transit security currently involves 185 full-time Chicago police officers assigned to the system, as well as up to 180 officers who can patrol on voluntary duty and 50 sheriff’s police participating in a pilot program. ATU Local 241 President Keith Hill questioned whether adding off-duty Chicago police would solve the problem and said union members believe sheriff’s police have had the greatest impact. He argued the 50 sheriff’s officers are not enough. Union leaders also criticized Cook County’s electronic monitoring system. Campbell was allegedly on electronic monitoring at the time of Mobley’s killing. Cook County State’s Attorney Eileen O’Neill Burke has urged state lawmakers to restrict which people awaiting trial can be released on electronic monitoring. In September, she cited people charged with murder, attempted murder and predatory sexual assault who were on the program as examples of cases she believes are inappropriate for release under those terms. The competing proposals leave city and county officials facing renewed pressure to explain how existing patrols, enforcement policies and station conditions will protect the people who work on—and rely on—the CTA.