Cook County prosecutors conspired to prevent a nephew of former Mayor Richard M. Daley from being charged with killing David Koschman, attorneys for Koschman’s mother argued Friday in urging appellate judges to reinstate a civil rights lawsuit she filed that was dismissed earlier this year.
The motion from Nanci Koschman’s lawyers came two weeks after the Cook County state’s attorney’s office and former prosecutor Darren O’Brien argued they can’t be held liable for failing to charge Daley nephew Richard J. “R.J.” Vanecko because they have prosecutorial immunity.