On April 19, 2016, Isaiah Guajajara, 32 years old, was killed after being stabbed in the abdomen. He was rescued and taken to hospital by the local people, but died from his injuries. The crime occurred in the city of Amarante do Maranhão.

Isaias was a member of the Guajajara People and a resident of the Juçaral village, located on the Arariboia indigenous lands. His death was one of four recorded between March 26 and April 22; all involving residents of the Arariboia Indigenous Land in Maranhão.

The death of Isaias occurred on the day that is celebrated as the Indian Day in Brazil, which seemed an affront to the entire indigenous community.

The area has little surveillance, whence the killings continue without clear investigation of culprits. As a result, indigenous people continue to suffer from constant pressure from loggers, even when living in an area that has already been demarcated.