Roger McNamee was one of the early big investors in Facebook, a Silicon Valley venture capitalist

who became a trusted advisor to founder Mark Zuckerberg.

But in October 2016, he was disillusioned and even more alarmed.

McNamee had come across signs that Facebook, America's largest social media platform with

1.7 billion users was being manipulated by malicious actors for political purposes, who

were spreading phony news stories filled with conspiracy theories that inflamed voters.

Even worse, McNamee saw indications that Facebook tools were being abused by outside parties,

collecting data and spying on targeted groups, and that its facial recognition software

was being used to identify people who had never given permission.

McNamee laid all this out in a searing paper he sent to Zuckerberg and chief operating

officer Charles Sandberg.

There more than a decade of involvement with the company McNamee wrote,

Now I am disappointed, I am embarrassed, I am ashamed.

Facebook has done some things that are truly horrible and I can no longer excuse its

behavior.

Zuckerberg and Sandberg politely but firmly brushed McNamee off and referred him to a

top executive who insisted his concerns were overblown.

But the day after the 2016 election, McNamee hit the roof and lashed out at that executive

over what he was convinced had happened.

The Russians used Facebook to tip the election he shouted.

McNamee lays out his story in his new book, Zucked, waking up to the Facebook catastrophe.

We'll talk to him as well as a Yale Law School professor who's trying to educate the country

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