New Chief, Assistant Chief of U.S. Secret Service take oath of office. Washington, D.C., Dec. 31. Upon the retirement of Chief William H. Moran today Secretary of the Treasury Morgenthau named Frank L. Wilson to be Chief of the U.S. Sercret Service and Joseph H. Murphy as Assistant Chief. They are shown taking the oath of office. In the photograph, left to right: Joseph E. Murphy, Frank L. Wilson, Secretary Morgenthau, and Frank L. Dirgfeld, Chief Clerk of the Treasury