The solicitor representing a teenager who claims he was attacked by one of James Bulger's killers says he may take legal action.
Steven Smith says the boy alleges Robert Thompson tried to strangle him with an electrical flex in a secure unit where they were both held.
The 15-year-old claims the attack took place after a row in March 1999.
Mr Smith says the attack may affect Robert Thompson's parole terms and argues officers of the court are obliged to bring the allegations to attention.
He says that it is in the "public domain and of public interest".
Mr Smith says the alleged victim's parents did not take action at the time because their son was on the verge of being released.
But Thompson's solicitor Dominic Lloyd said in a statement: "I categorically deny there was an incident involving a piece of cord and an attempt to strangle someone."
The killers made eligible for parole after a ruling from the Lord Chief Justice, Lord Woolf last year.
But reports say if Robert Thompson is found guilty of assault the parole board would consider whether he can be safely released.