A 16-year-old gang boss terrorised his local community with gun rampages and terrifying firebombing attacks for months before he was finally put behind bars.
Baby-faced gang boss Harry O'Brien, who has been known to local police since the age of 12, was barely out of school when he was getting people double his age to do his bidding.
He brought fear to innocent families as he went to war with rivals in a campaign of wanton and brazen violence.
