After 20 years of working on it, the tribe last week sent 920 pounds of documents to the Department of Interiors Office of Federal Acknowledgement, according to Chris Molina, a spokesman for the Salinan Tribe of San Luis Obispo and Monterey counties.
Certainly the most definitive evidence comes from a series of Tweets from the now-deleted Twitter account of SuperBot level designer Chris Molina, who posted a screenshot of Twisted Metal character Sweet Tooth in the game.