Austin laid claim to rich tracts of land near bays and river mouths populated by the Karankawa. The Karankawa relied on these bays for the fish and shellfish that provided their winter protein sources and thus were fiercely protective of that land. Austin wrote upon scouting the land that extermination of the Karankawa would be necessary, despite the fact that his first encounter with the tribe was friendly. He spread rumors among the settlers of cannibalism and extreme violence of the Karankawa, sometimes more specifically the Carancaguases. Research has suggested that these accusations of cannibalism were false, possibly caused by confusion with another tribe, and that the Karankawa were horrified by cannibalism when they learned of it being practiced by shipwrecked Spaniards. Austin's stories primed the colonists to believe that the Karankawa would be impossible to live among and may have contributed to the Skull Creek massacre in which an Karankawa village was razed and 19 Kawankawa Indians were killed. After the massacre, Austin continued to encourage violence both against and between the Indian tribes, culminating in 1825 with his order for all Kawankawa to be pursued and killed on sight.