Locked up: thug who zapped teacher with a million-volt stun gun

A teenager who electrocuted a teacher with a stun gun of almost 1 million volts has been jailed.

Marvin Airey, 19, temporarily paralysed maths teacher Peter Kelly when he zapped him outside the school gates.

A teaching assistant came to her colleague's aid. But Airey, who was never a pupil at the school, punched her in the face, leaving her unconscious, with a fractured skull.

Airey's attack was completely "unprovoked", Bristol Crown Court heard.

Judge John Foley told him: "There is no justification or rational reason for doing what you did, which is an example of appalling gratuitous violence of the very worst type."

He sentenced him to six years in a young offenders' institution.

Airey bought the device, called a Black Viper Defender, on the internet.

Mr Kelly was walking home for lunch in October last year when Airey jumped out of a friend's car and zapped him in the back.

He then punched the teacher repeatedly in the back in front of pupils at Ashton Park Secondary School in Bristol, until Mr Kelly fell to the ground.

Mollie Dawnay, who was on supply at the school, pleaded with Airey to stop, but she too was attacked.

Jonathan Stanniland, prosecuting, said: "Mr Kelly felt a sharp pain and thought he had been stabbed, because the stun gun discharged several thousand volts of electricity into his back.

"He tried to defend himself using his umbrella but to no avail.

"As he repeatedly punched Mr Kelly, Mrs Dawnay pleaded with him to stop but he didn't stop, he struck her with one long, hard blow to her left jaw. She fell on her face and she appeared to be unconscious before she hit the ground."

Airey sped away in a car with blackedout windows. Police found the gun, which is illegal in Britain, at the scene.

The device is manufactured by Viper Defender, which says it is "the most powerful self-defence stun device of its kind".

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Airey, of Knowle, Bristol, pleaded guilty to one count of causing grievous bodily harm, one of possessing a prohibited weapon, and one of battery.

Initially he had claimed he had an alibi. The court heard he had lived alone since he was 15, and that he took drugs. He was expelled from three schools and had no job.

On the day of the attack, a friend had driven him to the school, where the pair were 2goading" each other into using the gun.

Ramin Pakrooh, defending, said: "The stun gun was purchased on the internet by Mr Airey and the plan had been to use it on somebody."

He added: "It was Mr Kelly's misfortune the stun gun was used on him."

Mr Kelly returned to the school soon after the attack, but Mrs Dawnay suffered months of trauma, the court heard. She only returned to teaching five months later.

Her son Mark, 20, said: "It's been really hard for my mum. He's got what he deserves."