FILE - In this May 29, 2012 file photo, Washington Mayor Vincent Gray speaks at a news conference on Capitol Hill in Washington. A federal grand jury is investigating the awarding of th

 

              FILE - In this May 29, 2012 file photo, Washington Mayor Vincent Gray speaks at a news conference on Capitol Hill in Washington. A federal grand jury is investigating the awarding of th
FILE - In this May 29, 2012 file photo, Washington Mayor Vincent Gray speaks at a news conference on Capitol Hill in Washington. A federal grand jury is investigating the awarding of the $38 million contract to run the District of Columbia lottery, a process that raises further questions about corruption in a city government already beleaguered by criminal prosecutions. (AP Photo/J. Scott Applewhite, File)