Sam Walker already had a huge rap sheet in his native Liverpool before 2018, when he took off across Europe and through the Sahara Desert into Sierra Leone - posting on social media the whole time. There he crafted a new life as a saviour of Freetown’s slums. But is there another, darker motive for Walker’s second act? Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices">megaphone.fm/adchoices</a>

South Africa's Rampaging Murder Rate: Gangs, Corruption and State Capture

Underworld exposes the secret world of transnational criminal networks that have flourished since there were banks to bust, drugs to smuggle, and scams to run. Journalists Danny Gold and Sean Williams bring their experience reporting on dangerous people and organizations to take listeners on a global tour of mobsters, warlords and crooks - from Brooklyn to Beijing, from the streets to the boardrooms - and everywhere in between. Underworld is a show about heroes, villains, and the barely visible mafias that affect all our lives, whether we know it or not.