McKenzie Garreaux was 16 and from Rapid City, South Dakota, when she disappeared in the days before the last Friday of August 2021. Her family reported her missing on August 20, and she was unaccounted for for about a week.Gunfire was reported around 9:30 a.m. on August 27, 2021, at an apartment complex in north Rapid City.

Police found McKenzie injured and emergency life-saving efforts were made; she was transported to a hospital and later died from gunshot wounds. The scene became a homicide investigation focused on who had been with her and what happened inside the apartment.Investigators identified 19-year-old Nathaniel Gray Eagle of Rapid City as a suspect, and a firearm believed to be used in the shooting was recovered near the location.

Gray Eagle was located and taken into custody without incident later that day; prosecutors filed a first-degree manslaughter charge and he was held without bond.