We’re the only people in the nation and probably globally that have to prove who we are, and prove our blood quantum,” said Jimi Castillo, 78, a spiritual leader who is a member of the Tongva tribe.We’re the only people in the nation and probably globally that have to prove who we are, and prove our blood quantum,” said Jimi Castillo, 78, a spiritual leader who is a member of the Tongva tribe.