By David Ariosto, CNN
Cambodia, long suspected of being fertile ground for human traffickers, has drawn recent attention after reports of sexual abuse and widespread mistreatment prompted government actions to improve the plight of its young women and girls.
Considered a modern-day form of slavery, human trafficking involves the illegal trade of people and commonly includes sexual exploitation and forced labor. FULL POST
CNN went undercover with the Mossos d'Esquadra - the human trafficking unit in the Catalonia region of Spain - as it tackled a major investigation into Chinese prostitution in the region.
Now, the unit takes CNN inside another case it has cracked. But this Nigerian prostitution ring had many factors investigators hadn't seen before.