Gates takes the arrow to archaeologist Lillian Sloan, who identifies it as a replica of the arrows used by Cheyenne Dog Soldiers. Gates doesn't think it's a replica and, after some library research, develops a long list of people who have disappeared into the Oxbow. He also finds a story of a "wild child" captured in the woods in the early 20th century. Now, he's convinced that the fugitives were killed by a tribe of Dog Soldiers, a hardy band of Native Americans who somehow escaped the 1864 Sand Creek massacre and survived for 128 years, secluded in the Montana Wilderness, killing anyone who threatened to find and expose them.