I made the assumption the bow was in Martin's hands alone. Nothing to suggest improper bow handling. Well except the brain fart aspect.
An old Pal-O-Mine was hunting in Maine and the whole bunch of them had loaded guns in the MV. ( Sort of a tradition there ) and they saw a green pick up truck in the rear view. This dope starts working the lever on his 30/30 and it went off catching him right thru the elbow. Finished his days as a lobsterman. He is what I refer to as a MORON!!!