[He wants to point out that he's not the bloody detective here, but refrains, trying to think harder.]

You didn't mention marks around his neck, so that's the noose out for the murder weapon. Might have been the revolver if the killer used the butt, but there are easier ways to kill someone with a gun. Probably not that, then. Someone also managed to drag a grown man from the ballroom, completely unnoticed, during a party. He was left, though which means the killer was interrupted somehow. Maybe they heard me coming? Or they were interrupted by someone else. That implies someone else may be a witness, even if they didn't actually see the body.

I can ask around, see if any of the other guests saw another person outside in the past hour.