Victim Robert Wilson had asked the pair to stop loitering outside of his factory in Huddersfield, West Yorkshire.
Rather than heeding Mr Wilson’s advice – who was a supervisor at the Thornton and Ross pharmaceutical plant in Huddersfield – the boys hacked him to death with a samurai sword and tried to decapitate him.
Mr Wilson had even offered to help them when they said they were outside because they had ‘lost their phone.’
Kiyran Earnshaw, 18, pulled a 20 inch sword from his trousers and he and accomplice Luke Gaukroger, 16, killed Mr Wilson.
CCTV footage shows Earnshaw coldly pass the sword to Gaukroger who then hacked at father of two and married husband Mr Wilson.
Gaukroger was only 15 at the time of the murder last year.
Audio recorded from Mr Wilson’s phone call to a security firm captured the younger of the two shouting ‘get his head, I want to cut his head, Kia I want to cut his head’.
His wife Elaine said at Leeds Crown Court today that the killers ‘Do not deserve a place in society’.
She said she was sickened to receive a letter from one of the defendants saying it was the ‘worse night of my life and ‘I’m sorry”.
She told the judge she had been shocked to ‘feel so much hate’.
She said to the defendants: ‘I want you to know you have taken the life of a much respected, admired and good man.’
Prosecutor Peter Makepeace QC, said that after they resumed the attack, ‘Earnshaw and Gaukroger together holding the sword and crouching to the upper body then seem to make a concerted effort to saw the head from the shoulders’.
‘Both then jointly stab the upper body using their combined force.’
Police who arrived at the scene reported seeing one of the pair ‘using the sword in sawing motion to the neck area of the deceased as if trying to detach the head from the body’.
Mr Makepeace said Earnshaw was Tasered twice before he was arrested and officers used an incapacitant spray on the boy.
Fellow colleague of Mr Wilson named as John Badejo, was also seriously injured as he tried to save his friend.
The teenagers admitted to murdering Mr Wilson and Grievious Bodily Harm with Intent against Mr Badejo.
Police statements show that both teenagers were slurring after arrest and admitted to taking Xanax and Cocaine.
Jailing Earnshaw to life with a minimum of 22 years and Gaukroger to life with a 16 years and 8 months, Judge the Honourable Mr Justice Lavender told them: ‘You were both highly intoxicated when you used a samurai sword to inflict wounds on Robert Wilson, who had done no wrong.
‘You each consumed a great deal of alcohol and drugs.
‘You used the sword in repeated attempts to cut off his head.
‘The two of you went back to him several times, not only stabbing him but kicking him and stamping on his head.
‘You passed the sword between you, continuing to stab Mr Wilson as he lay dying.
‘This frenzied and senseless attack on a man who was quite unable to defend himself went on for ten minutes.
‘You only stopped when police arrived.
‘I have watched the recording and it’s a truly gruesome sight.’
DCI Marc Bowes of the Homicide and Major Enquiry Team, Senior Investigating Officer in the case, said: ‘The murder of Mr Wilson and the serious assault on Mr Badejo were truly dreadful offences in what was a horrendous incident for the community of Linthwaite.
‘They both acted in a manner which many of us would struggle to comprehend and committed acts which were among the worst that I and other members of my investigation team have witnessed in our policing careers. Thankfully such acts are very rare occurrences in today’s society.’
He added: ‘We can’t begin to imagine the appalling impact Mr Wilson’s murder has had on his family. Their courage and dignity in coping with such a traumatic event has been immense.’
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