There are reports of persons missing in Singapore, like in 1986 the 2 sce 1 boys, in 1997 a 17 year old poly student.
A person is declared as dead if there are no news or contact within 7 years.
What happen to these missing persons, even thought Singapore is a small island.
There are bad people out there, like the trafficking of humans by syndicates or slavery, ritualistic killings by some demented religious person, like adrian lim.
Could it be stepped into another dimension?
I highly doubt it is anything supernatural. There are many reasons why a person can become lost and not be found again. If you get killed and burried somewhere or thrown into river, without anyone knowing, how can you ever find it?