In normal circumstances, law in many places just presume innocent unless proven guilty. But in Singapore's system, it is kind of different. Whenever the criminal case is brought to the court, you will be seen as guilty unless proven innocent.
The "authority" of the establishment cannot be "compromised" or seen as "wrong" unless there are glaring evidence to prove otherwise.
Take for example, once they find drugs in your bag, it will be assumed you are trafficking it even though someone might have sabo you by slipping it into your bag. And that, is mandatory death penalty.
Goh Meng Seng