Five boys, who hung out in the mountain just behind their homes to search for frogs never came back home and their remains were found a couple of years later in the area where they had missed. Autopsy tells the boys were all brutally killed with a blunt object.
No suspect was reported or investigated. Any clue wasn't found. It was a huge mystery.
One the hypothesis claimed by some netizens is that the boys were killed by a crime syndicat which trade human organs.
In my thought, this hypothesis is the most probable. I really hope the author of this vicious crime must be arrested and every misterious element about this case will be unfolded.