In 1955 de Silva succeeded his father-in-law,
Sir Richard Aluwihare to be appointed as Inspector General of Police (IGP). He became the first IGP appointed from within the police force and the first Buddhist. De Silva was responsible for introducing
community policing to the country, a vision that was not shared by his successors. In 1959 the
Prime Minister of Ceylon,
S. W. R. D. Bandaranaike requested that the police intervene against trade union action occurring at
Colombo Harbour. De Silva declined to do the Prime Minister’s bidding on the basis that he believed the request was unlawful. On 24 April 1959, de Silva was compulsorily retired from the police force and
M. Walter F. Abeykoon, a civil servant, was appointed in his place. == Family ==