Rain In The Face. At the Battle of Little Big Horn, he was alleged to have cut the heart out of Thomas Custer. According to legend, he was fulfilling a vow of vengeance. He thought Captain Tom Custer had unjustly imprisoned him in 1874 for the murder of Dr. John Honsinger. Some accounts claim that he had personally killed George Custer as well, but a number of similar claims have been attributed to other warriors. Late in his life, he denied killing George Custer or mutilating Tom Custer.