Senate Permanent Subcommittee on Investigations

The Permanent Subcommittee on Investigations (PSI) is the oldest subcommittee of the United States Senate Committee on Homeland Security and Governmental Affairs (formerly the Committee on Government Operations).

When the Truman Committee was terminated in 1948, the Investigations Subcommittee of the Committee on Expenditures in Executive Departments continued that committee's investigation of war contracts and procurement of the Hughes XF-11 reconnaissance aircraft and the Hughes H-4 Hercules flying boat (Spruce Goose). The subcommittee also assumed responsibility for the records of the Truman Committee.

Under the chairmanship of Homer S. Ferguson of Michigan (1948) and Clyde R. Hoey of North Carolina (1949-1952), the Investigations Subcommittee of the Committee on Expenditures in Executive Departments held hearings on such matters as export control violations, for which Soviet spy William Remington was called in to testify; the trial of Nazi war criminal Ilse Koch; and the Mississippi Democratic Party's sale of postal jobs, which Mississippians from rural areas attested to purchasing. A much larger scandal erupted with the "5 percenters", so-called because these men, including Presidential aide Harry H. Vaughan, were accused of charging a 5% commission for their influence in securing government contracts. A legislative reform as a result of the hearings was a restriction of one year after leaving government employment before an attorney could practice law again before the government.

...
Wikipedia