The Jeju Island case is a case that was buried even before the investigation began

They didn't even upload it to KICS (Korea Information System of Criminal-justice Services).
This is what happens when the police monopolize investigative powers.
If a gang of thieves were to fall victim, they would act like this: "If I tell the media what happened to me, I'll just be used for the prosecution's media play," and they wouldn't report it, right?