As the mayor left City Hall in May of 2011, 31-year-old Janusz Kopycinski yelled an expletive at Daley.
Officers chased after Kopycinski, and as they were arresting him, an officer was slightly injured by a moving CTA bus.
Kopycinski was found guilty in April of aggravated battery to an officer, a felony.
Kopycinski told the judge he didn't intend to do any harm.
