By Karla Mendes This story was supported by the Pulitzer Center’s Rainforest Investigations Network where Karla Mendes is a fellow. ARARIBOIA INDIGENOUS TERRITORY, Brazil — Cattle are being illegally raised in the Arariboia Indigenous Territory in the Brazilian Amazon, amid a record-high number of killings of the region’s Indigenous Guajajara inhabitants, a yearlong Mongabay investigation can reveal. Commercial cattle ranching is banned on Indigenous territories in Brazil, but our investigation found that large plots in Arariboia’s southwestern region have been used for ranching. Mongabay visi…