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MURDERER Rikki Johnson was on a night-time curfew and was wearing an electronic tag when he stabbed Lewis Singleton to death.

The teenager repeatedly broke an order banning him from leaving his Southampton home between 9pm and 7am, handed down by magistrates just weeks before he killed 18-year-old Lewis, the Daily Echo can reveal.

A jury this week unanimously convicted Johnson, 19, of murder and violent disorder.

Co-defendant Sercan Calik, 19, of Burgess Road, Bassett, was also found guilty of manslaughter.

Yesterday Harvell Mason, 17, of Saltmead, St Denys, was acquitted of both murder and manslaughter after the jurors failed to reach a verdict despite nearly 22 hours considering the evidence.

Until now Mason has not been identified, but at the request of the Daily Echo judge Mr Justice David Steel lifted the legal restrictions on his identity after he was convicted of violent disorder.

A fourth defendant, a 16-year-old who cannot be named for legal reasons, was cleared of all charges.

Speaking after the case, Lewis' mother, Jeanette Singleton said she did not believe her son had received justice and expressed her horror that Johnson had been able to break his curfew.

Johnson, of Honeysuckle Road, Bassett, who has previous convictions for violence and witness intimidation, was given the community order, which also required him to carry out unpaid work, in February last year, for a burglary offence.

But he repeatedly broke the rules by turning up late to the work sessions and breaching his monitored curfew.

Each time he broke the order the security firm monitoring him - Group 4 Securicor - contacted Hampshire Probation Service, who were then responsible for taking the matter back to court.

Just two days before Lewis' death, on March 31 last year, a date was set for a court hearing on April 20.

It is believed that on the weekend Lewis was murdered, Johnson broke his curfew on three nights consecutively for periods of between seven and nine hours each time.

Hampshire Probation Service has carried out an internal review into the management of Johnson and liaised with the government's Ministry of Justice.

A spokesman said: "Rikki Johnson had a community order with a supervision, unpaid work and curfew requirement in force at the time of his arrest (on suspicion of the murder of Lewis).

"The community order commenced on February 19, 2007 and this order had been breached and returned to court on March 29 for failure to comply with the unpaid work requirement.

"During the contact period an internal review has found that the risk assessment, risk management and links to the electronic provider were satisfactory."

A spokesman for Group 4 Securicor (G4S) said Johnson had been successfully monitored between February 19 and March 31, and that all equipment used was found to be in full working order.

"G4S is contracted to provide electronic monitoring services to the Ministry of Justice," he said.

"Electronically monitored curfews are implemented under the specific instructions of the court. As the contract provider, we take our responsibilities for monitoring people seriously. Public protection is at the heart of our operation."

Yesterday, Mrs Singleton said the case left many unanswered questions.

"Rikki Johnson was on tag, but he was able to murder Lewis," she said, fighting back emotion as she talked to the assembled media outside Winchester Crown Court.

"We live in a society where human rights and politically correct brigades are hell bent on giving people who commit violent crimes chance after chance.

"What chance did Lewis get?"

Flanked by friends and family all wearing specially made T-shirts bearing a photo of Lewis, Mrs Singleton said her son was a warm and caring well-known and popular member of the community. He was our son, brother, grandson and uncle. He was our best friend, soulmate and mentor. He was our life.

"There are no words or actions strong enough to express our grief and pain of not having Lewis around anymore. We will never get Lewis back. There will never be justice."

Johnson, Calik and Mason will be sentenced next month.