William Riley Gaul was indicted on charges of first degree murder, especially aggravated stalking, theft, tampering with evidence, reckless endangerment, employing a firearm during a dangerous felony, and felony murder charges. The charges relate to the death of 16-year-old Emma Walker. Investigators said that on November 21, 2016, Gaul fired a gun into Walker's bedroom while she was asleep, killing the Central High School cheerleader. The Knox County Sheriff's Office reported that Walker had broken off a relationship with Gaul two weeks before they said he fired a 9 mm handgun into Walker's bedroom.