Kicking anyone in the head and then stamping on a head is 'yob-supreme' behaviour.
As a 'devil's advocate' I'm not sure what my response would be if I'd just seen my smaller, female colleague's nose broken by being punched in the face by a bigger, stronger male assailant.
I'd be perty darn angry and would be taking that MFer down; hopefully without resorting to yobo behavior nor guns.
However I'm not a police person so what I think is worth nort compared to what actual police people have to do and deal with every day.