Ok, and I block you from going anywhere. Now you see I have a gun.... Now what? I'm NOT going to let you leave.<quoted text>
In this case? I'd take out my cell phone and dial 911.
No I don't know if that's what happened, but who knows what happened? The only other person who knows is dead so we have to look at EVERYthing.
And no matter what, the police will not make it before it ends so waiting is not an option.