Graham Buck killed 'defending neighbour Francis Cory-Wright'

Detectives want to question Ian John McLoughlin about the murder

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A man died in an effort to protect his neighbour - a convicted paedophile - during an attack, it has emerged.

Police are treating the death of Graham Buck, 66, in Little Gaddesden, near Berkhamsted, on Saturday, as murder.
He was protecting Francis Cory-Wright, who indecently assaulted a 10-year-old boy in the 1970s, when he was killed.
Detectives want to question 55-year-old Ian John McLoughlin, also known as Ian John Baker, in relation to the death. Police say he is "extremely dangerous".
Hertfordshire Police stressed Mr Buck and Mr Cory-Wright were neighbours and were "not believed to be connected in any other way".
Mr Cory-Wright, who is in his late 80s, was jailed for 30 months in 2011 for assaulting the boy.
Mr Cory-Wright, a former underwriter with Lloyds, is currently being treated in hospital for injuries he sustained during the attack.
It is understood Mr Cory-Wright and Mr McLoughlin know each other from prison.
Fishing by canal A police spokeswoman said: "It is believed that the victim has been murdered after coming to the aid of a neighbour."

Francis Cory-Wright, jailed for indecent assault, is in hospital

Det Ch Insp Martin Brunning, from the Bedfordshire, Cambridgeshire and Hertfordshire major crime unit, said: "We are continuing to treat the death as murder.
"We urgently want to speak to Ian McLoughlin in connection with this offence."
He is described as white, about 6ft (1.8m) tall, with straight, greying, collar-length hair and of average build.
He is believed to have been wearing sunglasses, blue jeans or three-quarter length trousers and a dark blue, light blue and white checked short-sleeved shirt with a button-down collar.
Anyone with information has been urged to contact police or Crimestoppers.
Extra patrols are being carried out in the area surrounding the murder scene.
Before Mr Cory-Wright was imprisoned, St Albans Crown Court was told the abuse had taken place over a summer when the victim met Cory-Wright while fishing with his father by the canal in Berkhamsted.
He offered to take the boy fly-fishing and shooting, the court was told.
Mr Cory-Wright would then pick the boy up in a vintage car and take him out into the country before abusing him.