Ir emember a movie where a bunch of college age kids were hanging out in an what seemed like a high rise. There was a rich kid that lived there and as poeple would leave someone would kill them. I remember one getting killed in the hallway by an elevator. It seemed they were waiting for someone to shw up and we find out he is in a trunk in the living room dead.
Prom night comes to mind on this one. although I never saw the whole movie, so I’m not sure about the trunk part.