This is what Zim says happened at the exact moment. He also was questioned about it during a stress test (Lie detector test) and passed it.
"I didn't want him to keep slamming my head on the concrete so I kind of shifted. But when I shifted my jacket came up…and it exposed my firearm. That's when he said you are going to die tonight. He took one hand off my mouth, and slid it down my chest. I took my gun aimed it at him and fired."
I am also not trying to start an argument or anything. I would not like for this thread to get shut down like the other ones. I believe that we should be able to talk about this, and provide our opinions without name calling, and that should be acceptable.