Series: Modern-day slavery in focus
Tuesday 10 June 2014 12.05 BST
Kate Hodal, Chris Kelly in Songkhla and Felicity Lawrence
Thai 'ghost ships' that enslave and even kill workers are linked to global shrimp supply chain, Guardian investigation discovers
• Trafficked into slavery on Thai trawlers to catch food for prawns
• Thailand's seafood industry: state-sanctioned slavery?