In the Seminole Nation v. United States case of 1941, the Supreme Court ruled in favor of the Seminole Nation, a Native American tribe based in Oklahoma. The dispute arose over funds that were held by the U.S government on behalf of the tribe under an agreement made in 1823. The Seminoles claimed that these funds had been mismanaged and sought compensation for their losses. They argued that they should have received interest payments on these funds as per usual trust fund management practices but did not receive any such payments from 1906 to 1935 due to negligence by federal officials overseeing Indian affairs at this time period. The court agreed with them and ordered reparations be paid out accordingly.

In the dissenting opinion for Seminole Nation v. United States, Justice Frank Murphy argued that the majority's decision was a departure from established principles of law and equity. He contended that the Court had failed to consider adequately the unique relationship between Native American tribes and the federal government, which he believed should be characterized by trust rather than strict legal obligations. In his view, this fiduciary duty required more than just passive non-interference; it imposed an active obligation on part of U.S government to protect tribal interests even if no explicit treaty or statute mandated such protection. Furthermore, he disagreed with majority’s interpretation of 1906 Act as extinguishing all future claims against U.S arising out of any past treaties with Seminoles. Instead, he interpreted it as merely limiting time within which these claims could be brought forward but not barring them altogether after certain period has passed.