Supreme Court Building. On 15 March 2010, in one of his last cases before his term of office ended, he defended the constitutionality of capital punishment in Singapore before the Court of Appeal in an appeal by a man sentenced to death for drug trafficking. At the third annual Singapore Children's Society Lecture entitled "Changing Social Mores: Protecting Children from Themselves?" on 31 October 2009, Woon expressed the view that prosecuting teenagers from having underage sex with each other served little purpose. "It's basically kids having sex ... What do you do if the couple think they're in love? It's less easy if the girl consents. ... The judges cannot do very much by themselves. Sending them [the teenagers] to jail per se will not make them reflect on their lives. That is the last thing that is going to happen. But good or ill, this is the framework that we have." Woon established a new division in the Attorney-General's Chambers for the prosecution of cases in the Subordinate Courts of Singapore to enhance the development of criminal litigation skills, and recruited a number of young and talented lawyers into the Singapore Legal Service. In 2008 he hosted the International Association of Prosecutors Conference in Singapore. He also assisted in the setting up of the Centre for International Law at NUS to improve international law expertise in Singapore and the region. He was Singapore's alternate representative on the High Level Task Force for the Drafting of the ASEAN Charter, a key constitutional document for ASEAN, which was signed in November 2007. Subsequently, he co-authored a book entitled The Making of the ASEAN Charter (2009). Woon stepped down as Attorney-General on 10 April 2010 after a two-year term. In a media interview, he said that the post "was not a job I really wanted or enjoyed. I did it because I was asked to do the job. So I did my best under the circumstances with what I had." When asked whether he had "annoyed the powers that be", he said: He subsequently clarified that when he said he had outstayed his welcome he had been "thinking more about the people I prosecuted rather than anything else", and that "I was kidding, I was being facetious". Return to academia Woon returned to academia at NUS, and was appointed the first Dean of the Singapore Institute of Legal Education (SILE), a company