I'm not sure. The wood is rather hastily made, but the worst of the splintering is around the bloodied part.

[ He pauses, considering. ]

Then again, they tried to hide this thing under that dummy, using rope, so it's possible they may have come in contact with that part too, I suppose.

[ Ah, but then-- he looks down at his hands. He's wearing gloves, like he does every day. He's gonna regret saying this. ]

Unless the killer was wearing gloves?