One of the evil killers of toddler James Bulger is back in prison after being caught with vile child abuse images, The Sun can reveal.
Monster Jon Venables, now 35, was arrested last week in a top secret police operation.
Officials are understood to have found the stash of indecent material on his home computer during a routine visit early last week and swiftly alerted cops.
And chillingly, the grim haul is thought to include "sickening" child abuse images similar to those that sparked his recall to jail in 2010.
Just hours later Venables was taken under heavy guard to a maximum category A jail, which we cannot identify for legal reasons.
He is currently being held there for breaching the terms of the life licence handed to him and pal Robert Thompson after the abduction, torture and murder of two-year-old James on Merseyside in 1993.
Venables has not yet been charged with any offence but is now also the subject of a major police investigation.
The "immediate recall" procedure means Venables has been returned to prison twice in the last decade despite vast sums - estimated at up to £5 million ($A8.7 million) being spent on his rehabilitation.
After Venables was freed on parole again in July 2013, James's anguished dad Ralph Bulger warned: "It is only a matter of time before he caves in to his lust for young children again."
Venables is understood to have been living in a secret location in the North of England under a second new identity given to him following his release from prison in 2013.
But news of his second recall to custody in just seven years is sure to spark fury from James' parents, Denise Fergus and Ralph Bulger.
The convicted pedophile, seen as an ultra-high risk ex-offender, has been constantly monitored by probation officials in recent years.
They are believed to have visited his home early last week and found evidence of the images on an electronic device.
Venables will now be held indefinitely while the new allegations are probed and a Parole Board assesses him once again.
In theory, he could now be kept inside for the rest of his life if the Board decides he poses too much of a risk to ever be freed again.
If charged by prosecutors with a new offence, Venables would also face a new Crown Court trial.
But he would be likely to appear via videolink from jail to protect his face and new identity from being exposed in public.
Now back in prison, Venables is thought to be housed in complete isolation from other inmates for his own safety.
During his last recall to jail he was held in a self-contained annex and monitored 24/7 by at least two prison officers.
Official records later revealed the around-the-clock guard had cost taxpayers a staggering £279,000 ($A488,166) in just 18 months.
While inside, Venables was also given access to a private rowing machine, allowed to paint his cell and given private guitar lessons to pass the time, all funded by the public purse.
Venables was last recalled to prison in February 2010 when officials found him hoarding child abuse images of children as young as two.
He was later charged and convicted of downloading and distributing the photos and given a two-year jail term.
It later emerged Venables had persistently flouted strict parole terms by visiting Liverpool to go clubbing and watch football, while drinking heavily and taking cocaine.
Last night a source close to the investigation told The Sun: "It's all about protecting the public.
"We have these systems so those who could be a risk to the public are picked up.
"That's what happened here."
A Ministry of Justice spokeswoman said: "We do not comment on individual cases."
In July 2013, James' anguished dad Ralph Bulger darkly warned: "Jon Venables is and always was a predatory sex killer who will never be changed.
"He will always be a danger to children which is why he must be locked up for life."
Mum Denise Fergus, who split from Ralph after the tragedy, added: "There are experts who say Jon Venables is a psychopath and I believe that is true.
"I fear they will find that with him they have another Ian Brady on their hands."
Venables and Thompson shocked the nation when the barbaric details emerged of James Bulger's murder on February 12, 1993.
The pair, then aged 10, snatched the toddler from his mum as she let go of his hand for a few seconds to pay for sausages at a butcher's in a shopping centre in Bootle, Merseyside.
Venables and Thompson then led James two miles away through traffic, and along a canal towpath, before battering him with a 22lb iron bar.
They poured modelling paint into his eyes, stoned him and clubbed him with half-bricks, before leaving him on the railway line to be sliced in two by a train.
In November 1993, the pair, by now both 11, were found guilty of abducting and murdering James after a trial at Preston Crown Court.
The verdict made them the youngest convicted murderers in Britain for 250 years and they were detained in youth custody indefinitely.
They spent seven years receiving costly treatment and rehabilitation at secure units in the North West before finally being released in 2001.
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