In the 1980s, he became known for his resistance to the Chico River Dam project and for handling the cases of Ama Macliing Dulag who was murdered by the military and Pedro Dungoc who escaped an attempt on his life by the AFP.
Tampok ang papel niya noong dekada 1980 sa paglaban sa proyektong Chico River Dam at sa kaso ng pagpatay ng militar sa lider katutubong si Ama Macliing Dulag at ang tangkang pagpatay kay Pedro Dungog.