Overview: What drives a person to make a living out of killing? Mariana goes inside the dark world of contract killers.
Overview: Mariana investigates a new blackmail scam called "sextortion", in which compromising photos are used to extort victims and often leads to suicide.
Overview: Mariana exposes how black market operators are profiting from the sale of stolen human remains on secret marketplaces in the U.S. and beyond.
Overview: The high cost of prescription drugs has pushed millions of Americans to the black market — and into hands of criminal syndicates looking to cash in.
Overview: Mariana heads to the Congo to investigate the illegal trade in wild apes that have them on the brink of extinction.
Overview: Mariana heads to Mexico to investigate the billion-dollar business of people smuggling to the US — a system fueled by cartels and corruption.
Overview: Mariana tracks the illicit path of hashish from Morocco into Europe — a world of shadowy dealers, lightning-fast smuggling boats and endless wealth.
Overview: Mariana investigates a nefarious scam that tricks elderly Americans into becoming unwitting drug mules.
Overview: Mariana investigates a nefarious scam that tricks elderly Americans into becoming unwitting drug mules.
Overview: Mariana's investigation into how gold mining is funding terrorism gets interrupted by a military coup that strands the team in Niger.