The Pozzetto massacre in Bogotá, 1986
On 4 December 1986, Campo Elías Delgado, a Colombian Vietnam veteran working as a private English tutor, killed his mother and several people in and around his building. He then went to the Pozzetto, an Italian restaurant in Bogotá's Chapinero district, ate and drank, and opened fire on the diners. His rampage came after years of lonely, orderly routine, and he framed it through a Jekyll-and-Hyde self-image.