In 1978, in Oliphant v. Suquamish Indian Tribe, the Supreme Court prohibited tribes from prosecuting non-Native Americans for crimes committed on tribal land. This left a serious gap. Tribes can …In 1978, in Oliphant v. Suquamish Indian Tribe, the Supreme Court prohibited tribes from prosecuting non-Native Americans for crimes committed on tribal land. This left a serious gap. Tribes can …