NBC’s Dylan Byers had a fantastic scoop this morning. He got hold of an internal Facebook document that indicated Facebook learned about the potential Cambridge Analytica issue in September 2015. That is contrary to what Mark Zuckerberg said in his testimony.
The document reveals that Facebook first learned about unconfirmed reports of a potential data violation in September 2015 and sought to address the issue but was not made aware of the full scope of the problem until a Guardian report was published in December 2015. Mark Zuckerberg has testified that Facebook learned from The Guardian report that developer Aleksandr Kogan sold user data to Cambridge Analytica, a violation of Facebook’s policy prohibiting researchers from selling or sharing data with third parties.