Okay. Will post a few thoughts on this one. If someone wants to fight it out for a bit, then that's good...
We've got two potential things going on, that would set the stage for what happened:
Someone beating the living shit out of someone else, with a stated attempt to kill him for some perceived slight. In other words: Perhaps Martin was prone to being an explosively violent and dangerous person, but (through age) hadn't had opportunity to develop any significant record to show it.
..or..
Two people acting upon the fear of being shot.
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You have to believe one of those things occured, to explain what happened.
Right..or not?