Cambridge Analytica Exposed / Drugs on the Dark Web / Murder in Slovakia (The Investigators with Diana Swain)

The investigation into Cambridge Analytica's manipulation of Facebook data became one of the biggest news stories of the week. We talk to a member of the investigative team at Britain's Channel 4 about their undercover work. Watch The Investigators Saturdays at 9:30 pm ET and Sundays at 5:30 pm ET on CBC News Network.