Actually he switched back. The Pine Ridge reservation (Lakota) and Costner have been in a 4 year war over gaming (he owns a couple of casinos in Deadwood), and they are not on good terms with each other at all.
Costner is friends with my brother, he comes fishing to Dad's every summer. I think he's a royal dick.
Edit: Costner is a dick. My brother and Dad are chill.