A man who earned the nickname ‘the world’s scariest debt collector’ has opened up about how he managed to get off antipsychotic drugs in prison, as well as surviving a number of attempts on his life.

Shaun Smith made his name as the enforcer and debt collector for a Liverpool-based crime gang, and was known as someone who ‘sprayed up houses with machine guns, tortured people and used homemade napalm to firebomb his enemies’.