Homicide case involving Daley nephew closed without charges BY TIM NOVAK, CHRIS FUSCO, FRAN SPIELMAN AND CAROL MARIN Staff Reporters Last Modified: Mar 5, 2011 02:04AM For the first time, the Chicago Police said Friday they know who hit David Koschman and knocked him to the ground in a drunken confrontation in the Rush Street area, leading to his death from a brain injury 11 days later — but they’re not telling.