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Ashlynne Mike, 11, was killed over a year ago in Navajo Nation.

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Suspect in killing of Navajo girl pleads guilty to murder

A man charged with murder, sexual assault and other counts in the death of an 11-year-old girl on the largest American Indian reservation changed his pleas to guilty Tuesday in a case that prompted calls to expand the Amber Alert system and the death penalty to tribal communities across the U.S.