Mexico 'crime scene' skulls in a cave turn out to be from A.D. 900

Experts said the victims in the cave had probably been ritually decapitated and the skulls put on display on a kind of trophy rack known as a "tzompantli.” Spanish conquistadores wrote about seeing such racks in the 1520s. Photo: AP

When Mexican police found a pile of about 150 skulls in a cave near the Guatemalan border, they thought they were looking at a crime scene, and took the bones to the state capital.

It turns out it was a very cold case.