The attack happened in Mandeville Way, Marks Tey (credit: Google Maps)
The victim, who is in his 40s, was lured to an alleyway near Mandeville Way, Marks Tey, where he was attacked by the trio.
Calvin Armstrong, 22, of Westbury Road, Barking, was found guilty found guilty of attempted murder yesterday at Ipswich Crown Court.
Donald Adu, 25, of Howard Road, Stoke Newington, and a 16 year-old boy, who cannot be named for legal reasons, were convicted of the same crime.
They are due to be sentenced on Friday, 29 November.
Investigating officer Detective Constable Mike Heslegrave, from Colchester CID, said: “This was a frenzied and sustained attack that could have had fatal consequences.
“The victim sustained serious, life-changing injuries. Local residents came to his aid at the time and their intervention could have been the difference.
“The three who carried out the attack are dangerous individuals who now face time behind bars.
“Essex will be a safer place with them there.”
Tags: Essex, Barking