Two defendants in the case of a boy beaten with a hammer at a school in Wiltshire have now named each other as the main attacker.
Henry Webster suffered brain injury in the attack at the school
Henry Webster, 16, was punched, kicked and hit repeatedly on the head at Ridgeway School in Wroughton, in 2007.
Four teenagers, Wasif Khan, 18, Amjad Qazi, 19, and two boys aged 15 and 16, deny inflicting grievous bodily harm.
Wasif Khan told Bristol Crown Court on Wednesday that Amjad Qazi had attacked the victim.
Giving evidence he said he had travelled to the school in a car with three other people to ensure young Asian pupils could make it home safely after trouble earlier in the day.
He said he had no idea that violence would take place, and only ran onto the tennis courts once a fight had started to get his friends out.
Mr Qazi struck the victim over the head with what he thought was a knuckle duster, he told the court.
"I saw Qazi striking Henry Webster. He had some gloves on, so I could see he had something silver in his hand," he added.
Afterwards he said he ran off because he panicked.
"I didn't want to be in the centre of it all. I never attacked him. I just wanted to get out of there."
Mr Qazi has previously named Wasif Khan as the one who beat Mr Webster with a hammer.
Mr Webster suffered brain injury in the attack.
The case continues.