New Top Cop's Fiancee Under Investigation For Alleged Police Exam Cheating By Mark Konkol and Heather Cherone Updated April 5, 2016 THE LOOP — Mayor Rahm Emanuel's newly appointed top cop Eddie Johnson's fiancee is a Chicago Police lieutenant named in an ongoing investigation into alleged cheating on the department's lieutenant's exam, DNAinfo Chicago has learned. It's the same cheating probe that sources said helped derail Deputy Chief Eugene Williams' chances of being promoted to police superintendent. Now the allegations are part of a separate probe, this one by Chicago Inspector General Joe Ferguson, sources said. Williams, one of the...