Former officer of Dorset Police, Lorne Castle, was dismissed by the force after it was found he had committed gross misconduct in relation to the arrest in Bournemouth town centre.
Shocking footage shows how PC Lorne Castle grabbed the 15-year-old boy, who was suspected of assault, and pushed him into a wall before slamming him into the ground.
The decision to dismiss Bournemouth officer PC Lorne Castle has prompted fury after he wa accused of gross misconduct - with critics calling a ruling 'perverse'.