Paul Fitzgerald, 30, is accused of murdering Richard Huckle, 33, at HMP Full Sutton in East Yorkshire, northern England, in October 2019. Huckle was stabbed, strangled with a ligature, and had a kitchen utensil forced up his anus, the court was told.

Fitzgerald denies murder but accepts killing Huckle by reason of diminished responsibility, the jury heard. Prosecutors allege Fitzgerald attacked Huckle as “a form of punishment” for the crimes he had committed and because he wanted Huckle to “feel what all those children felt”.

Huckle was serving 22 life sentences for abusing nearly 200 children from 2006 to 2014 while teaching English in Malaysia. He admitted an unprecedented number of offenses, including rape against babies, toddlers, and children between the ages of six months and 12 years, and was jailed for a minimum term of 25 years in 2016.

Opening the prosecution’s case, Alistair MacDonald QC said Fitzgerald was found by another inmate in Huckle’s cell “straddling” the victim, who was on the floor near a pool of blood. Prison officers were alerted and found Huckle gagged and bound by his hands and feet, with a ligature around his neck. “Richard Huckle suffered death as a result of ligature strangulation as part of a sustained attack,” MacDonald said.

Fitzgerald later told the manager of the mental health team at the prison that he “murdered Mr. Huckle in cold blood and would have liked to have cooked bits of his body”, the prosecutor said.

“He said he enjoyed what he was doing to the body of Mr. Huckle and that he would have gone on to kill two or three others,” MacDonald said. “The reason he did not was that he was having too much fun with Mr. Huckle.”

He said the attack was “carefully planned and executed” and told the jury that Huckle - a notorious predatory pedophile - was “subjected to a prolonged attack also designed to humiliate and degrade him.”

The jury was told that at the time of the killing, Fitzgerald was suffering from mixed personality disorder, psychopathy, and gender identity disorder.

The trial continues.