James Bulger killer Jon Venables was taken back into custody after a bust-up at work, it has been reported.
The 27 year old grappled with a colleague and had to be pulled away - eventually being suspended from his workplace after an official complaint was made and then recalled to prison, the Daily Mirror reported.
He is also alleged to have a history of drug abuse since being released in 2001 on licence after serving eight years for the infamous murder.
The revelations, which the Ministry of Justice refused to comment on, came as calls intensified for the Government to make public details about his recall to custody last week for breaching the terms of his release.
James' mother Denise Fergus - who has not been told why the killer was back behind bars - told the Mirror: "We have a right to know," a call echoed by the murdered toddler's father.
Ralph Bulger, 43, said: "We are still in the dark about why he has been sent back - it's a disgrace. It is one more kick in the teeth for James and his family."