A drug-addicted robber has been arrested over the murder of child sex killer Colin Hatch at one of Britain's most secure jails, sources have said.
Damien Fowkes, 35, was held after Hatch was taken hostage and attacked by a fellow inmate at the maximum security Full Sutton prison near York on Tuesday night.
Hatch, 38, was told he must serve the rest of his life behind bars after being convicted of killing a seven-year-old boy while on parole for a previous child sex attack.
Fowkes, who was transferred to the jail last year, was given a life sentence, and told he must serve a minimum of 12 years, by Northampton Crown Court in September 2002 for three robberies over four days.
He was arrested on suspicion of murder after Hatch was taken hostage and killed last night, sources told the Press Association.
Humberside Police said a 35-year-old inmate was arrested on suspicion of murder and was still being held at the prison. He will be transferred to a police station "at a later date".
Hatch had a string of convictions for assaulting young boys when he was jailed for the murder of seven-year-old Sean Williams in January 1994.
Jailing Hatch, Judge Nina Lowry said he was "highly dangerous".
Sentencing him at the Old Bailey, the judge said: "It is not possible today to envisage when you could be safely released from prison and as of today life imprisonment should mean what it says - namely imprisonment for life.
"In my judgment, you should never be released back into the community while there remains the slightest danger you will reoffend."
