For most of us, the name Frances Halgan is still brand new.

The Facebook whistleblower revealed herself to the world earlier this month.

But a reporter at the Wall Street Journal has known Halgan for the better part of a year.

He worked hard to secure her trust and then to read through all the documents that she

brought out of Facebook in order to tell a shocking story about what Facebook really

knows about how it impacts its users.

So what was that source relationship like?

And what's coming next from the journal?

Those are a couple of the questions for this week's Reliable Sources podcast.

So let's cue the music.

I'm Brian Stelter and this weekly podcast is our chance to go more in depth talking

with media leaders and newsmakers about how the news gets made and how the media really

works.

And this week's guest knows, first hand, how the news gets made, he led the Facebook

files, the Wall Street Journal investigation into internal research showing harms caused

by Facebook, Instagram and other platforms.

His name is Jeff Horwitz, you may have seen him on television recently even sporting

a signature headband that's been getting lots of attention.

What's getting the most attention, rightly so, are the revelations from Frances Halgon.

Her statements to the journal for statements to Congress and now to legislative bodies

around the world.

And it all started when Halgon replied to a message from Jeff Horwitz on LinkedIn.

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