 He addressed the United Nations Commission on Human Rights in Geneva in 1997 and 1999 and the European Parliament in 1998 on the grievances of Sri Lanka's Tamil population.He was involved in the Krishanti Kumaraswamy case and was instrumental in bringing attention to the Chemmani mass graves.He was noted for his appearances, "pro bono", on behalf of Tamil youth detained by the state under the Prevention of Terrorism Act and emergency regulations.