Louis Theroux: Dark States - Trafficking Sex

Houston is the fourth largest city in the US and the number one hub for human trafficking in North America. The US Department of Justice estimates that at least one in five of all the country's victims are trafficked through the city - and most will be forced to work in the sex industry. Louis explores the often complex dynamic between prostitute and pimp as he tries to understand what stops these women breaking free. He also embeds with law enforcement and meets Vice Division officers tasked with persuading the working women to speak out against their pimps.