Jon Venables, one of the killers of toddler James Bulger, has been jailed for possessing child abuse images for the second time.
James' parents, Denise Fergus and Ralph Bulger, were in court to hear Venables' latest guilty pleas.
"The length of the sentence is too short. Three years is really a farce because this is reoffending and there is a pattern to this behaviour", Johnson said, according to the Press Association.
He added: "There should be no further collusion or attempts to cover up his offending behaviour. If re-bailed he must be kept on a very tight leash".
Prosecutor Louis Mably QC told the court how Venables' computer was seized in November past year.
Venables was released after serving eight years for the murder and has breached the terms of his licence numerous times since. The court case revealed he had almost 400 images classed as Category A (the most severe type of child abuse material), 148 Category B pictures and 630 classed as Category C.
Venables, 35, has been sentenced to 40 months in jail after officers recovered 1,170 images and films from his computer.
In a murder that shocked the world, Venables and his friend Robert Thompson, also aged 10, killed and tortured James in Liverpool 25 years ago.
In 2010, Venables was sent back to prison after pleading guilty t charges of downloading and distributing them.
It's the second time that Venables has been caught with child abuse images.
He pleaded guilty to having indecent images of children and having a so-called "paedophile manual" when he appeared at the Old Bailey this morning. "I have had stupid urges, inquisitive".
They found a paedophile manual aimed at teaching how to have sex with children "safely".
He said he never attempted to contact children for sexual purposes and the images he downloaded were for his own personal use.
Mitigating, Edward Fitzgerald QC said Venables had "expressed profound remorse for his part in the murder (of James) and worked hard for rehabilitation".
The mother of murdered toddler James Bulger accused authorities of covering up the extent of his killer's "vile" behaviour as he was locked up once again.
Speaking to Trevor McDonald in a new documentary to be broadcast on ITV tonight - the 25th anniversary of James's murder - Ms Fergus says: "I never said "lock them up and throw away the key". I thought doing a proper sentence in a proper prison would be justice for James.
He said the Parole Board would decide when Venables would be released. "But that never happened".