I wouldn't rule Mixon out based just on that incident. I think you have to look into his background and see if he's just a real jerk, or if he's a guy who had a bad reaction in an adversarial situation. Of course, you might have to look into whether he's a guy prone to bad reactions in adversarial situations. What he did though appears to be a bad reaction, not a premeditated decision to punch a woman in the face.