"Here's what we know:"??????<quoted text>
So if you get into a fight with someone and you're losing then fatally shooting your unarmed opponent is justified.
Here's what we know:
Zimmerman pursued Martin.
Martin had every right to be where he was when he was there.
So...Tenzing was there at night watching the whole Zimmerman-Martin engagement transpire.
Getcher azz down there to testify, Dood!