What does Bruce learn about the Motilones?

Bruce learns about the Motilones from Miguel Nieto, his superior at the Ministry of Health. Nieto tells Bruce that the primary contact between the Motilones and civilization is arrows. No one knows the Motilone language or has ever been close enough to them to learn about their culture. They live in a wild jungle area between Venezuela and Colombia. Only American oil companies are interested in that area because of oil reserves. Any time one of their employees enters Motilone territory, they are shot. Many have been wounded, many have been killed.