A teenage attacker who was found guilty of murdering Bolton schoolboy Reece Tansey has been handed a 15 year sentence.
Another boy, found guilty of manslaughter for his part in the brutal stabbing of 15-year-old Reece, was jailed for six years.
A court heard that the attackers - named Boy A and Boy B for legal reasons - had agreed to meet up in the early hours of May 4 in Walker Avenue, Bolton, because of an escalating dispute between Boy B and a friend of the victim.
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But, when Reece arrived he was stabbed six times by Boy A.
He banged on the door of a nearby house desperately pleading for help before falling to the ground.
And, having been discovered by two men, he used his final breath to tell them the names of his killers.
Police arrived at the scene minutes later and Reece was rushed to Salford Royal Hospital, where he was pronounced dead at 5.45am.
A pathologist concluded his death was caused by 'multiple stab wounds', which 'were likely to have been inflicted by a knife with a 10-12cm blade'.
After fleeing the scene, Boy A sent a Snapchat video of himself carrying a knife covered in blood, accompanied by the word ‘muppet’.
He later sent a message to Boy B, which read: "I thought it only went through his coat so I kept doing it.
Adding: "He's dead now."
Boy B responded with a laughing emoji.
Both teenagers appeared at a sentencing hearing at Manchester Crown Court today (January 21) where judge Justice Farbey was told there was a 'long-standing hate' between Boy B and Reece, and Boy A had been brought into the dispute as support.
During a three-week trial, jurors heard that the two boys had goaded Reece and his friend into meeting them, but he was initially reluctant.
The court heard he had sent a message to his friend, which read: "Getting brought into your s*** again. Ain't in no f****** mood".
All four boys eventually agreed to meet that night and Reece left home and headed to the rendezvous point near Great Lever Park.
But as Reece was en route, his friend informed him that he had decided to stay in bed.
Before the trial Boy A admitted killing Reece but denied murder. Boy B admitted he was there but denied killing Reece or knowing Boy A had a knife.
Richard Wright QC, who represented Boy A in the trial, told the court how the dispute was part of a 'petty subculture' brought on via social media.
Mr Wright said: "It is a fact that they were all young people and a fact that their culture, that all of them engaged in, driven by social media led to them meeting up."
He added: "It might be said that all were particularly vulnerable due to their age, from being drawn into this petty sub-culture of social media interactions and bravado.
"They were all vulnerable to that and unfortunately one of them lost their life."
In a victim statement read out in court, Reece's mum Laura said: "Reece was our 15-year-old son, he made us smile, he made us laugh, he made us tear our hair out at times, a typical teenage lad, but he was ours.
"Reece was fiercely protective of his mum and little brother, and saw himself as the man of the house. His dad saw him as his best friend.
"Reece was simply our world, and his death has devastated us beyond belief."
Boy A was handed a 15-year-old sentence while Boy B was jailed for six years.