Five teenagers have now been convicted over the killing of schoolboy Keon Lincoln in Birmingham in January this year.
Kieron Donaldson was cleared of murder but found guilty of manslaughter a day after Tahjgeem Breakenridge, Michael Ugochukwu along with a 16-year-old and a 14-year-old who can't be named were convicted of murder.
Over five weeks, a trial heard how Keon was subjected to a "short but brutal" attack by the gang outside his home.
Police say they are unable to determine whether this was linked to rival gangs or whether Keon was specifically targeted or attacked by chance, but speaking at a vigil after his murder, family friend Pastor Neville Popo called for an end to a so called 'postcode war'.
Speaking after the convictions, he said the verdicts would bring some peace to the family.
He said: "From then until now we're still trying to come to terms with why - we still don't know.
"The crime that was committed on Keon is heinous, it's diabolical, it's unnecessary, it never needed to happen. We are trying come to terms with that and just want closure.
"It helps his mother to at least feel a bit more peace to know that those who did the crime are now behind bars."
The killers have been remanded in custody and will be sentenced later this month.