Since 2001, he has conducted research about the U.S. military base on the Indian Ocean island Diego Garcia and the expulsion of its native people during development of the base. As a result of this work, he is serving as an expert witness for lawyers in the United States and Great Britain bringing suits against the U.S. and U.K. governments on behalf of the exiled people, known as Chagossians. He recently completed a book manuscript about the history of the base, the lives of the people, and U.S. foreign policy, entitled Imperial Paradise: Expulsion and the U.S. Military Base on Diego Garcia.