Shaun Carter has been cleared of the murders of a mother and her three children in a house fire in Leicester but guilty of their manslaughter.
The jury has retired to further consider verdicts against the remaining five defendants after the judge told them he would now accept majority verdicts.
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Kumran Ghalib stayed in hiding abroad while his 18 accomplices were jailed for a combined total of more than 200 years.
The bike went at speeds of up to 70MPH
Mongo was 22 years old