Mitchell’s attorneys sought a delay from the U.S. District Court in Arizona where he was sentenced in the 2001 slayings of a 63-year-old fellow Navajo tribal member and her 9-year …Mitchell’s attorneys sought a delay from the U.S. District Court in Arizona where he was sentenced in the 2001 slayings of a 63-year-old fellow Navajo tribal member and her 9-year …