Would you?
Lets say, and imagine it could be possible, that you are invited to stay a night in the same haunted hospital. All events play out the same way, and now you and someone else are trapped out on a ledge with a check each for a million dollars.
It's gonna be a while before someone see's you up there to call for help to get you down.
Do you sit and wait for help and start up a conversation with the other person... or push them off the ledge after you swipe their check so you now have 2 million. Just tell people the ghosts pushed him as he climbed out the window!
Personally, I am not a murderer. But I wondered why there was no mention of him in the sequel?