Laquan McDonald

Jason Van Dyke, the Chicago Police officer charged with murder in the 2014 death of 17-year-old Laquan McDonald, remains free on bond.

A defense expert for Chicago Police Officer Jason Van Dyke told a judge Friday that too many people have formed opinions about Van Dyke, who fatally shot a black teen in 2014, for him to get a fair trial in Cook County.

McCarthy presumably would challenge Rahm Emanuel, the elected leader who fired him in 2015.

Judge Vincent Gaughan says the case has generated thousands of pages of documents and emails and that various issues must be decided before a Chicago police officer can stand trial.