Charles Sobhraj is a convicted killer and the inspiration for the new BBC One drama, The Serpent. Julia and Sofie speak with producer Paul Testar about the unlikely history of Interpol, missing persons, and Sobhraj’s many escapes. We also hear audio clips from Herman Knippenberg, who played a crucial role in Sobhraj’s capture.Find out how he once tunnelled a hole through the ceiling of a jewellery shop, faked the symptoms of appendicitis, and threw a birthday party for the Tihar Jail’s prison guards – and even why there is a statue of him in a restaurant in Goa, India.Warning: This episode contains strong language and references to violence and murder. Presenters: Dr. Julia Shaw and Sofie Hagen Producer: Simona Rata Music: Matt Chandler Series Editor: Rami TzabarCommissioning Producer: Hannah Rose Commissioning Executive: Dylan Haskins Commissioning Editor: Jason PhippsBad People is a BBC Audio Science Production for BBC Sounds #BadPeople_BBC