By Graham Lee Brewer BELCOURT, N.D. (AP) — More than 50 years after a shootout on the Pine Ridge Indian Reservation landed him in federal prison, Leonard Peltier remains defiant. He maintains his innocence in the deaths of two FBI agents in 1975 and sees his newfound freedom — the result of a commutation from former President Joe Biden — as the beginning of a new phase of his activism. “I’m going to spend the rest of my life fighting for our people, because we ain’t finished yet. We’re still in danger,” Peltier, now 80, said in an exclusive interview with The Associated Press at his new home on the Turtle Mountain Reservation, his tribal homeland in North Dakota, near the Canadian border. There among the rolling, often snow-covered hills,…