He was also conferred the Knight Grand Cross (First Class) of the Most Noble Order of the Crown of Thailand by the King of Thailand in March 2002, the Bintang Bhayangkara Utama (National Police Meritorious Service Star) by the President of Indonesia in June 2002 and the Panglima Gagah Pasukan Polis (Kerhormat) (Knight Grand Commander, Order of Police Heroism) by the Yang di-Pertuan Agong of Malaysia in April 2003. In July 2004, Khoo was conferred the Darjah Pahlawan Negara Brunei Yang Amat Perkasa Darjah Pertama (Order of the Hero of the State of Brunei, First Class) by the Sultan and Yang Di-Pertuan of Brunei Darussalam and it comes with the title of Dato Seri Pahlawan.