image copyright Family document image caption Christopher Hewett, 31, was rushed to hospital with stab wounds to the chest but died shortly after his arrival
A 17-year-old boy has was convicted of murdering a father of two who was fatally stabbed.
Christopher Hewett, 31, was found injured at his sister's home in Stevenage, Hertfordshire, February 12.
A 15-year-old boy was cleared of murder by jury in Luton crown court but sentenced to manslaughter.
The teenagers , who cannot be appointed due to their age, will be sentenced on August 27.
Mr. Hewett was on his way to his sister's house with his cousin when they passed a group of four youngsters, the court heard.
Prosecutor Paul Cavin QC said words were exchanged between Mr Hewett and the group.
"As they approached the front door of [his sister's house], the group was behind them " he said.
Image copyright South Beds News Agency caption image Christopher Hewett, of Stevenage, was on his way to his sister's house in town
Mr Calvin said the 15-year-old was holding a baseball bat and that Mr. Hewett was hit by the bat and was grappling with it when the 17-year-old came in from behind and made a number of stabbing motions.
The youngsters stood together ran away and when Mr Hewett's sister opened her door she saw her brother being restrained by their cousin.
Mr Calvin testified that Mr Hewett sustained a large injury to his side that his cousin tried to compress, but Mr. Hewitt was pronounced dead in hospital about an hour after the attack.
Detective InspectorIain MacPherson of Hertfordshire Police said: "A father, brother and son have died and two boys face significant prison terms for it.
A third teenager , Ryan Lee, 19, Wildwood Lane, Stevenage was convicted of aiding offenders and will be sentenced along with the other two teenagers in August.
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