A man accused of fatally stabbing a Chicago Transit Authority worker outside a train station during a daytime confrontation had previous alleged encounters with the law, authorities said.
Chevazz Campbell, 37, is charged in the stabbing death of Julian Mobley, 41, a husband, father and CTA janitor, according to FOX 32 Chicago.
The attack occurred shortly before 3 p.m. Thursday at the Damen Green Line station.

Chevazz Campbell, 37, has been charged with murder. (Chicago Police Department)
Prosecutors allege that Campbell entered the station without paying, sparking an argument with Mobley. Campbell then allegedly sprayed the CTA worker in the face with mace twice before stabbing him in the neck.
The allegations were detailed by prosecutors, according to FOX 32.

Police say a CTA worker was fatally stabbed Thursday at the Damen Green Line station in Chicago. (FOX 32 Chicago)
At the time of the alleged attack, Campbell was being monitored electronically and had at least four probation-violation filings related to curfew violations, FOX 32 reported.
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Police tape surrounded the Damen Green Line station in Chicago after authorities said a suspect wearing an ankle monitor stabbed and killed a transit worker. (FOX32 Chicago)
Chicago police confirmed to News Media that Campbell also allegedly robbed Mobley. He was arrested several hours after the stabbing, authorities said.
The Amalgamated Transit Union said in a statement: “ATU Local 308 Brother Julian Mobley, a CTA Janitor, was tragically killed while trying to stop an attack on a fellow member over a fare dispute. He died a hero.”

Police say a janitor was stabbed to death after a suspect wearing an ankle monitor attacked him. (FOX32 Chicago)
Chicago Mayor Brandon Johnson said in a statement: “My administration remains committed to doing everything in our power to ensure safety on the CTA for its commuters and its committed employees who make public transit possible.”
Campbell faces charges of first-degree murder, armed robbery and unlawful possession of a weapon by a felon.
News Media has contacted the Chicago Transit Authority for comment.
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