Diego Garza was an oil worker on the Galpex Orpheus,which was an oil platform in the Gulf of Mexico. He and his friend, Simon de la Cruz were Waicha Indians, who are immune to the alien black oil virus and they knew the intentions of virus. Diego and Simon wanted to destroy the communications equipment of the Orpheus so that with black oil infected humans would not be able to communicate with the alien spacecrafts. Garza was hiding on the oil rig after the friend's death. However, later his infected colleagues found him and killed with radioactivity. (TXF: "Vienen").