It was a January afternoon in 1981 when a man’s German Shepherd came upon a grisly discovery in the woods outside of Houston: the badly decomposed remains of a young man, beaten to death, and a woman, who was strangled. For 40 years, the victims were nameless – until late 2021, when a team of genetic genealogists identified the pair as 21-year-old Harold Dean Clouse and 17-year-old Tina Gail Clouse, a married couple who had moved from Florida to Texas with their infant daughter. But the discovery of the identities only deepened the mystery: who killed the couple and why? And where is their...