Can you kill monsters by swinging objects?

[Kein]

You can't "kill" any of them, there is no such animation or script. For example, check my "Avoid capture" video.

Yes, Brute disappears when he falls down in Choir but he being quickly respawned right after that. I never was able to load Choir level but I believe there is a trigger zone at the pit's bottom that just respawns him. They don't die.