Maria McCarthy is a career prosecutor who worked as an assistant state’s attorney in the Cook County State’s Attorney’s Office for 30 years.  From 2009 to 2019, she was Supervisor of the Third Municipal District, where she oversaw the prosecution of all felony and misdemeanor cases from approximately 25 suburbs of Chicago, including Arlington Heights, Inverness, Mount Prospect, Palatine, Prospect Heights, Rolling Meadows and Wheeling.  Prior to holding that position, Maria was the Supervisor of the Homicide/Sex Unit in Chicago, the Supervisor of the Domestic Violence Division and was a Deputy Supervisor in the Traffic Division.