Facebook whistleblower says Canadian firm worked on software to find GOP voters

Last Updated Mar 27, 2018 7:49 AM EDT

LONDON -- The whistleblower at the heart of the Facebook privacy scandal has testified before British lawmakers investigating the increasing rise of fake news.

Christopher Wylie has alleged that Cambridge Analytica harvested details of 50 million Facebook users and used the material in U.S. President Donald Trump's 2016 election campaign.

Continue reading: CBS News