Where a Freedom of Information Act request is made seeking law enforcement records that pertain to an ongoing investigation by a municipal body, that body may assert their exception not only against their own records, but against records kept by other law enforcement agencies relevant to the proceedings.The 1st District Appellate Court reversed and remanded a decision from Cook County Circuit Judge Anna Helen Demacopoulos.Valerie Percy was murdered on Sept. 18, 1966, by an assailant who remains unknown. Her killer entered …