...[Sohka]...recently returned after nearly two years in captivity...[He] was the property of a deep-sea trawler captain...purchased...through brokers promising under-the-table jobs in a fish cannery...“We worked constantly, for no pay, through seasickness and vomiting, sometimes for two or three days straight”...Near-daily death threats reinforced the captain’s supremacy...Thailand is the United States’ second-largest supplier of foreign seafood...Denying that the fruits of forced labor reach the biggest importers of Thai seafood — Japan, America, China and the European Union — has become increasingly implausible...[I]ndustry representatives in Thailand admit there's often no way to tell whether a particular package of deep-sea fish was caught using forced labor...[E]xporters, said [Arthon Piboonthanapatana, secretary general of the Thai Frozen Foods Association] are not in the business of policing the fishing syndicates that supply their factories...American seafood importers consider themselves similarly powerless in overseeing far-flung Thai boats...