Mob of teens film themselves attacking and robbing disabled vet while shouting 'Knock that white boy out!

Matthew Robinson beaten and robbed by up to eight teenagers last Friday
The Army veteran was on a bus in Cleveland when he was mobbed
He said no-one tried to help
Police arrested three teens as they fled the scene, including a 16-year-old girl who filmed the attack

'What they were saying was, ‘Knock that boy out!’ ‘White boy.’ ‘Cracker'. They were saying, ‘Knock that white boy out','

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