Comment: Basic Overview (Score 5, Informative) 125
For anybody who wants a basic overview of Malay law regarding these matters, there's an issue of the Malayan Law Journal (actually an article supplement) that covers this in language easily understood by the layperson (and it's also in English, to boot). The PDF is located here: http://jeraldgomez.com/pdf/7cd40a1889d4539feffda786372ff33b.pdf and I would point you to page 3 (page 4 of the PDF).
Basically, they are based on English Common Law, and signed the UDHR, but have a history of legislation that allows detention without trial, originally designed to combat communism.