Anthropologist Carla Handley is sitting cross-legged in a mud-walled house in a Kenyan village called Merti. She's meeting with a man dressed in a flowing blue robe and a woven cap of red and white.

He's known as the Luce County John Doe. His skeletal remains were found 36 years ago in a remote wooded area in Michigan's Upper Peninsula with no identification, no definitive cause of death and no ...