If he did then Anthony has a defense. In Texas you can use deadly force to avoid a beating or bodily harm. Seen it many times here.
Don't get too wound up!
"Put your hands on me and see what happens... Put your hands on me again." As heard being said by Anthony to Metcalf according to multiple witnesses.
Under Texas Penal Code Section 22.06, titled "Consent as Defense to Assaultive Conduct" Anthony requested Metcalf to "touch him." This is considered consent for a fight. Anthony cannot claim self defense.
Cold blooded murder. Doesn't mean he won't be facing an all black jury, and incompetent prosecutor, and get the OJ treatment.