'Sadistic monster' handed whole-life sentence for the torture and murder of his partner and her two-year-old daughter dies in hospitalMoJ confirm David Oakes, 50, has died of natural causes
He murdered Christine Chambers and their child Shania in June last yearFormer couple were embroiled in a bitter custody battle
The family had just secured a restraining order against himAfterwards the killer tried to shoot himself in the head but survived
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Torture: Oakes forced Christine Chamber to cut chunks of her own hair off before killing her and Shania (pictured together) in an attack that shocked Britain
Oakes had 'systematically tortured' Ms Chambers for several hours before the killings, forcing her to strip and cutting chunks from her hair.
Ms Chambers' 10-year-old daughter fled the house during the ordeal as police outside attempted to negotiate with the killer.
Oakes, of Steeple, near Maldon, was given two whole-life jail terms after being found guilty of the murders, which happened in June last year.
Today the Ministry of Justice confirmed that Oakes had died from natural causes after being taken to hospital.
A Prison Service spokesman said: 'HMP Frankland prisoner David Robert Oakes died at hospital on Monday.
'He is presumed to have died from natural causes.
'As with all deaths in custody, the Independent Prisons and Probation Ombudsman will conduct an investigation.'
Attack: Oakes stormed their home in Braintree, Essex, with a number of weapons, intent on killing in the days after Christine had secured a restraining order
Family: Christine Chambers, 38, and her daughter Shania died, but her ten-year-old daughter managed to flee the scene
Oakes had denied two counts of murder but was found guilty after nine hours of jury deliberations at his trial in May.
Mr Justice Fulford ordered Oakes to serve a whole life sentence, making him one of a limited group of inmates who would never be released from prison.
Describing Oakes, he said: 'A bullying and controlling man, who had frequently inflicted violence on Miss Chambers during the six years of their relationship, he killed his ex-partner and their young daughter simply because he knew she could not bear to be with him and wished to start a new life.'
The trial heard Oakes arrived at the house with the shotgun, a drill and an axe.
Oakes did not appear in court to be sentenced, after prison guards raised concerns he would harm himself.
In November, the Court of Appeal refused to quash the whole-life order imposed on the killer.
He was one of several inmates who argued such orders were incompatible with Article 3 of the European Convention of Human Rights, which prohibits torture and inhuman or degrading treatment and punishment.
Judges rejected that argument, saying: 'Each of these appellants is dangerous, and on the available evidence, likely to remain dangerous for the indefinite future.'