The tomb of a headless man adorned with jade has been discovered beneath an ancient Mexican  chamber famously painted with scenes of torture. Found under the Temple of Murals at the Maya site of Bonampak, the man was either a captive warrior who was sacrificed—perhaps one of the victims in the mural—or a relative of the city's ruler, scientists speculate. Whoever he was, "the place of the burial tells us that the person buried there was special," said anthropologist Emiliano Gallaga Murrieta via e-mail. At the time of the murals' creation, about A.D. 790, Bonampak was a city of thousands. Today its most prominent vestige is a long-overgrown, partially excavated acropolis in the middle of a vast tropical rain forest in the southern state of Chiapas. Perched midway up the stepped acropolis, the Temple of Murals holds three elaborately painted rooms. Room One depicts the presentation of a young heir. Room Two, above the newfound tomb, is ringed with scenes of the torture of captive warriors—broken fingers, torn-out fingernails, heads without bodies. Room Three includes paintings of an elite bloodletting ritual.  Discovered by the outside world in 1946, the Bonampak murals eviscerated scholars' long-held belief in an ancient Maya Empire ruled by kindly astronomer-priests. The new tomb find may only add to the aura of violence. [...]