The 1979 Greensboro (North Carolina) Massacre of protestors by KKK members was investigated by the a Truth and Reconciliation Commission, which produced evidence, some of which appeared to have been covered up by law enforcement\.
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A Truth and Reconciliation Commission has already been employed in the United States, in the aftermath of the Greensboro Massacre (1979), a case where investigations by law enforcement and jury trials proved inadequate. [1,2]
At least in this case, the Truth and Reconciliation Commission (2005-6) was an important body in establishing some of the basic facts in the matter, which were covered up by government and its justice system, in part, it appears, because of involvement of law enforcement agencies in the underlying conduct.