A double murderer stabbed Sarah Payne's killer Roy Whiting in the eye twice because he was a "dirty little nonce".
Gary Vinter, 42, picked a high-profile target in July 2011 because he wanted to change the conditions in which he was held at Wakefield jail, West Yorkshire.
Roy Whiting, a convicted sex offender sentenced to life in prison in 2001 for the murder of eight-year-old Sarah, received emergency care following the attack in his cell and has recovered.
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