New Zealand Gang's (Documentary) #MongrelMob #BlackPower Two of the biggest patched street gangs and have been enemies since their inception. After decades of bloody war, New Zealand's two deadliest organized gangs. The Mongrel Mob and Black Power - are joining forces to tackle a mutual threat. New Zealand is a top destination for meth. The impact of South American cartels and an Australian immigration law has led to bloody turf wars. | Australia & NZ Real Crime TV