Baddest and fastest growing club in the world - 501s

Mongols rode to Christchurch where the gang patched over former members of the Hells Angels and started a chapter in the city.

Jim David Thacker is a former president of a Bandidos chapter in Queensland.

He is among thousands, known as 501s, deported to New Zealand since 2014 changes to Australian immigration law. The arrival of the 501s, named after the character section of their visas, has changed New Zealand's gang landscape. The total number of non-citizen criminals stripped of Australian visas is 4,150 since 2014.