CHICAGO — A top city of Chicago lawyer stepped down after a federal judge accused him of hiding evidence in a fatal police shooting, the latest allegation of wrongdoing amid ongoing scrutiny of how the city deals with such cases.

Separately, the city agency that investigates police shootings vowed greater transparency, saying Monday that it would start divulging some details of active cases as it tries to bolster public confidence in the process.

Since November, Chicago has been dealing with fallout from the release of a video showing a white officer fatally shooting black teenager Laquan McDonald. The video prompted protests and led to a wide-ranging civil rights investigation of the entire police department by the U.S. Department of Justice.