Crossword clues for Senate investigator.:PROBESenate investigation, e.g.PROBESenate investigationPROBERSenate investigator.OCONORNew head of Senate crime investigation.HALLEYCounsel for Senate Crime investigators.MEADChairman of Senate War Investigation Committee.ESTESFirst name of chairman of Senate crime investigating committee.ERVINHe directed the Senate's Watergate investigationERVINSenator Sam who investigated Watergate
