The Supreme Court decides that the Muskogee (Creek) Indian reservation in Oklahoma — created by a treaty with the USA — continued to exist after Oklahoma became a state. In a majority opinion written by Trump appointee Neil Gorsuch, the tribe regains legal jurisdiction for most crimes on reservation land, a territory amounting to about half of the state. Serious crimes like murder or child rape must be tried in federal courts. This means some criminals convicted under state law will get new trials, including Jimcy McGirt, who appealed his child sex-abuse conviction that led to this landmark SCOTUS decision.