In movies, I see police officers secretly disposing of bodies a lot?

Surely movies are just movies, right??
Even looking at "Unfair Trade,"
or that movie with Jang Hyuk, there are scenes like that,
and it shows up in Gangneung too; if you look for it, there are tons.
I assume they didn't make them based on real-life accuracy, though. ㄷㄷ