Jamie Crosbie guilty of murder after stabbing Norwich neighbour Dean Allsop 17 times

• Crosbie's arrest was filmed on police body-worn cameras, as ITV News Anglia's Natalie Gray reports

A man who flew into a rage over his neighbour's noisy motorbike, stabbing him 17 times in a "cold-blooded attack", has been found guilty of murder.

Jamie Crosbie, 48, stabbed father-of-three Dean Allsop near Norwich in April 2021, and had already admitted manslaughter on grounds of diminished responsibility.

A jury at Norwich Crown Court took two days to reach its conclusion after a three-week trial.

The court heard that Crosbie became annoyed after Mr Allsop’s son Mikey revved the engine of a motorbike they had been working on, and had attacked armed with a knife and a saw.

Crosbie was also found guilty of the wounding with intent of two women, Mr Allsop’s partner Louise Newell and friend and neighbour Kerryn Johnson, who had come out to help.

He was cleared of two counts of attempted murder.

Officers arrived at the scene in Primrose Crescent in Thorpe St Andrew seven minutes after the 999 call was made and found four people covered in blood and seriously injured, and people screaming.

Crosbie was arrested at the scene, initially on suspicion of assault and then later for murder.

He told officers: “That’s a good thing, I’m very happy about that. Killing people isn’t always a bad thing."

'My children have lost their hero'

In a statement released through police, Mr Allsop’s partner Louise Newell said: “I cannot put into words how this has affected our whole family.

“My children have lost their hero and I have lost my chosen person – the person I chose to spend my life with.

“My best friend, soulmate, my first love.

“Our lives will never be the same without Dean, but we will continue to keep his memory alive.”

'A cold-blooded attack'

Det Ch Insp Phill Gray, from the Norfolk and Suffolk Major Investigation Team, said: “This was a cold-blooded attack by a man intent on causing extreme harm to others.

“Dean suffered 17 stab wounds to his body, some of which were inflicted when he was lying face-down and motionless.

“Crosbie’s savage attack didn’t stop there; he stabbed two people who had come to help Dean, one suffering an arterial bleed to her neck.

“Crosbie is an extremely violent man who has no place in society, and we welcome the jury’s verdict today.”

Lawyers for Crosbie claimed he was suffering from "encapsulated delusional disorder" at the time of the attack, and had delusions about time machines as well as believing conspiracy theories about Google Earth.

A consultant psychologist said Crosbie had a "festering sense" that his life had been destroyed by Mr Allsop and an irrational belief he had been creating a significant community disturbance.

Jurors were told that Crosbie had threatened Mr Allsop with a knife in June 2018, almost three years before the fatal attack, after Mr Allsop put some rubbish in his wheelie bin.

Crosbie was brought to court in 2019 and was convicted of possessing a knife and criminal damage over the 2018 incident, but the neighbours continued to live in the street.

Crosbie will be sentenced at a later date.

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