Nathan Lee Chasing His Horse, who goes by Nathan Chasing Horse, was taken into custody in the afternoon near the North Las Vegas home he is said to share with his five wives. Known for his role as the young Sioux tribe member Smiles a Lot in the Oscar-winning Kevin Costner film, Chasing Horse gained a reputation among tribes across the United States and in Canada as a so-called medicine man who performed healing ceremonies and spiritual gatherings and, police allege, used his position to abuse young Native American girls. According to a 50-page search warrant obtained by AP, Chasing Horse is believed to be the leader of a cult known as The Circle.