I pulled this out of the Wolfe Indictment, they have been watching them for a long time notice the FBI approached Wolfe in October of 2017
>>>combine that with this old article from July of 2017
To summarize it describes how you catch a leaker by giving several documents out with slightly different details like the date, then when that story with the incorrect date appears in the media you know the leaker and who it was leaked too
Jeff Sessions: We're investigating 27 leaks of classified information
"Members of the committee, we had about nine open investigations of classified leaks in the last three years," Sessions said. "We have 27 investigations open today. We intend to get to the bottom of these leaks." Later, he described the numbers in more detail, saying the Obama-era DOJ investigated "three per year" while the Trump-era DOJ has "27 ongoing investigations." Leak investigations could result in criminal prosecutions or other punitive actions.
>>>Now take that info and look at these stories<<<
Dec 2017 CNN corrects story on email to Trumps about Wikileaks
When first published Friday morning, the story, written by senior congressional correspondent Manu Raju and politics reporter Jeremy Herb, said the email was sent to the Trumps on September 4, 2016. It was corrected to say that the email was actually sent on September 14, one day after WikiLeaks made the documents public. >>>And this article about some of the many correction The NY Times had to make
If the New York Times is so inaccurate, where are all of its corrections?
Trump and Putin Connect, but Avoid Talk of Lifting U.S. Sanctions, Jan. 28. Incorrect date
Sean Spicer, Trump Press Secretary, Is ‘Not Here to Be Someone’s Buddy’, Jan. 29. Incorrect detail
Travelers Stranded and Protests Swell Over Trump Order, Jan. 29. Incorrect date
Tech Companies Fight Trump Immigration Order in Court, Jan. 30. Incorrect date
Trump Supporters Applaud Immigration Order as a ‘Welcome Change’, Jan. 30. Incorrect detail
More People Were Affected by Travel Ban Than Trump Initially Said, Jan. 31. Incorrect detail
Kirsten Gillibrand and the Anti-Trump Left: 2020 Foresight?, Feb. 3. Incorrect detail
California Farmers Backed Trump, but Now Fear Losing Field Workers, Feb. 9. Incorrect detail
Trump Tells Xi Jinping U.S. Will Honor ‘One China’ Policy, Feb. 9. Incorrect detail
Trump Campaign Aides Had Repeated Contacts With Russian Intelligence, Feb. 14. Incorrect detail
Flynn Was Brought Down by Illegal Leaks to News Media, Trump Says, Feb. 15. Incorrect detail
Donald Trump, Mexico, Mideast Policy: Your Friday Briefing, Feb. 17. Incorrect detail
Trump’s Approval Ratings Are Down. How Much Does It Mean?, Feb. 17. Incorrect detail
Popular Domestic Programs Face Ax Under First Trump Budget, Feb. 18. Incorrect date
From Trump the Nationalist, a Trail of Global Trademarks, Feb. 21. Incorrect detail
Trump Ruled the Tabloid Media. Washington Is a Different Story., Feb. 25. Incorrect detail
Maybe telling us again about your degree, it obliviously wasn't anything dealing in observation or logic.