OKLAHOMA CITY (AP) — The Oklahoma Court of Criminal Appeals on Thursday overturned another state murder conviction because of a U.S. Supreme Court ruling that much of eastern Oklahoma remains an American Indian reservation.

Chickasaw Nation member Charles Michael Cooper was convicted and sentenced to life without parole for the 2016 death of Cindy Allen, who was found strangled inside her burned home in Pontotoc County on land within the historic reservation of the Chickasaw Nation.

The U.S. Supreme Court last year ruled, in what is known as the McGirt decision, that Oklahoma lacks jurisdictio...