7News has obtained disturbing pictures of the moment an AFL champion's teenage son knocked a boy unconscious as he waited for a school bus in Melbourne - targeted simply for having red hair.
As students wait patiently for the bus, two young men stride with purpose towards them.
Without warning, a boy in uniform is pushed.
But it's soon clear, this is no schoolyard tiff.
After being grabbed and pummelled, the victim is thrown to ground and swiftly kicked in the head.
Four left fists follow before a second kick, and a third to finish him off.
The young thug then adjusts his cap as he coolly walks away.
The unprovoked attack at Ringwood Station was carried out last October by a 15-year-old boy, who can't be named for legal reasons.
He pleaded guilty in a children's cour .and was sentenced to 12 months probation.
The violent teen is the son of a prominent AFL player - but instead of using his skills on the sporting field, the boy is getting his kicks by preying on others.
While the boy hasn't been named, 7News understands teenagers know who he is and several have also been harassed or assaulted by him but have been too frightened to come forward.
Psychologist Dr Simon Kinsella says such aggression in young males is all too common.
“Very often they're trying to maintain their reputation amongst their peers as being a tough person, a tough guy, and they don't give any real consideration to what impact it might have on the victim,” he told 7News.
The victim's parents hope their son's courage will encourage others to go to police.
They are considering legal action against the attacker's family.