Long before news broke that Cambridge Analytica had harvested information from Facebook users to help Donald Trump’s 2016 campaign, Sandy Parakilas says he warned Facebook executives of dangers that users’ data could be misused by third-party apps. WATCH:

Long before news broke that Cambridge Analytica had harvested information from Facebook users to help Donald Trump’s 2016 campaign, Sandy Parakilas says he warned Facebook executives of dangers that users’ data could be misused by third-party apps. WATCH: https://t.co/MMTMhni1PY pic.twitter.com/3LdGPyz3c0

— FRONTLINE (@frontlinepbs) March 24, 2018