FBI agents reportedly photographed Paul Manafort's expensive suits during its July raid at his house in Virginia

New details about a July FBI raid at Paul Manafort's home in Virginia shine a new light on the tactics Robert Mueller is using in his investigation of the Trump campaign's ties to Russia.

Manafort was still in bed when federal agents who were granted a "no-knock warrant" picked the front-door lock of his Virginia home in July, The New York Times reported Monday night.

After agents took documents, copied computer files, and photographed expensive suits in Manafort's closet, Mueller, who is the special counsel in charge of the Justice Department's Russia probe, warned Manafort that his prosecutors were planning to indict him, two of The Times' sources said.

Meet Manafort:

13 PHOTOS
Trump's former campaign manager Paul Manafort through the years
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Trump's former campaign manager Paul Manafort through the years
U.S. Republican presidential candidate Donald Trump's campaign chair and convention manager Paul Manafort speaks at a press conference at the Republican Convention in Cleveland, U.S., July 19, 2016. REUTERS/Carlo Allegri
Republican presidential nominee Donald Trump gives a thumbs up as his campaign manager Paul Manafort (C) and daughter Ivanka (R) look on during Trump's walk through at the Republican National Convention in Cleveland, U.S., July 21, 2016. REUTERS/Rick Wilking
U.S. Republican presidential candidate Donald Trump's campaign chair and convention manager Paul Manafort appears at a press conference at the Republican Convention in Cleveland, U.S., July 19, 2016. REUTERS/Carlo Allegri
Republican U.S. presidential candidate Donald Trump's campaign manager Paul Manafort talks to the media from the Trump family box on the floor of the Republican National Convention in Cleveland, Ohio, U.S. July 18, 2016. REUTERS/Jonathan Ernst
Paul Manafort, senior advisor to Republican U.S. presidential candidate Donald Trump, smiles as he talks with other Trump campaign staff after Trump spoke to supporters following the results of the Indiana state primary, at Trump Tower in Manhattan, New York, U.S., May 3, 2016. REUTERS/Lucas Jackson
U.S. presidential candidate Donald Trump's senior campaign adviser Paul Manafort (L) walks into a reception with former Republican presidential candidate Dr. Ben Carson, at the Republican National Committee Spring Meeting at the Diplomat Resort in Hollywood, Florida, April 21, 2016. REUTERS/Joe Skipper
CLEVELAND, OH - JULY 21: Trump campaign manager Paul Manafort listens to Ivanka Trump speak at the Republican National Convention in Cleveland on July 21, 2016. (Photo by Michael Robinson Chavez/The Washington Post via Getty Images)
UNITED STATES - JULY 20: A man with a security credential takes a selfie at the podium as Donald Trump, flanked by campaign manager Paul Manafort and daughter Ivanka, checks the podium early Thursday afternoon in preparation for accepting the GOP nomination to be President at the 2016 Republican National Convention in Cleveland, Ohio on Wednesday July 20, 2016. (Photo By Bill Clark/CQ Roll Call)
UNITED STATES - JULY 19: Paul Manafort, advisor to Donald Trump, is seen on the floor of the Quicken Loans Arena at the Republican National Convention in Cleveland, Ohio, July 19, 2016. (Photo By Tom Williams/CQ Roll Call)
MEET THE PRESS -- Pictured: (l-r) Paul Manafort., Convention Manager, Trump Campaign, appears on 'Meet the Press' in Washington, D.C., Sunday April 10, 2016. (Photo by: William B. Plowman/NBC/NBC NewsWire via Getty Images)
NA.R.DoleMicCk1.081596.RG.Republican presidential candidate Bob Dole looks up from podium at balloons and television cameras as convention center manager Paul Manafort, at right, points out preparations for tonight's acceptance speech in San Diego, 08/15/96. (Photo by Robert Gauthier/Los Angeles Times via Getty Images)
WASHINGTON, DC - MARCH 21: Paul Manafort, Roger Stone and Lee Atwater, young Republicans political operatives who have set up lobbying firms. (Photo by Harry Naltchayan/The Washington Post via Getty Images)
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The newspaper also noted the differences between how Mueller's team handles its two most high-profile subjects: Manafort and former national security adviser Michael Flynn. Where some members of the Trump team have been invited to speak with Mueller's investigators, Manafort and Flynn have received grand-jury subpoenas.

Part of Mueller's investigation has involved Manafort's longstanding ties to Russia-linked groups, including a Ukrainian pro-Russian separatist movement. Manafort has been the subject of at least two Foreign Intelligence Surveillance Act (FISA) warrants — in 2014, and again last year. The most recent warrant's authorization stretched into early 2017, according to a CNN report on Monday night.

"They are setting a tone," Solomon Wisenberg, the former deputy independent counsel investigating President Bill Clinton in 1999, told The Times in comments about the tactics Mueller's team is using in its investigation. "It's important early on to strike terror in the hearts of people in Washington, or else you will be rolled."

"You want people saying to themselves, 'Man, I had better tell these guys the truth.'"

Understand the Russia probe 

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Putting the Trump-Russia timeline into perspective
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Putting the Trump-Russia timeline into perspective
June 7: The 2016 primary season essentially concludes, with both Donald Trump and Hillary Clinton as the presumptive party nominees
June 9: Donald Trump Jr. — along with Jared Kushner and former campaign chair Paul Manafort — meets with Kremlin-connected lawyer Natalia Veselnitskaya.
June 9: Trump tweets about Clinton's missing 33,000 emails
July 18: Washington Post reports, on the first day of the GOP convention, that the Trump campaign changed the Republican platform to ensure that it didn't call for giving weapons to Ukraine to fight Russian and rebel forces
July 21: GOP convention concludes with Trump giving his speech accepting the Republican nomination
July 22: WikiLeaks releases stolen emails from the Democratic National Committee
July 25: Democratic convention begins
July 27: In final news conference of his 2016 campaign, Trump asks Russia: "If you're listening, I hope you're able to find the 30,000 emails that are missing"
August 4: Obama CIA Director John Brennan confronts his Russian counterpart about Russia's interference. "[I] told him if you go down this road, it's going to have serious consequences, not only for the bilateral relationship, but for our ability to work with Russia on any issue, because it is an assault on our democracy," Brennan said on "Meet the Press" yesterday.
October 4: WikiLeaks' Julian Assange says his organization will publish emails related to the 2016 campaign
October 7: WikiLeaks begins releasing Clinton Campaign Chair John Podesta's emails
October 7: Department of Homeland Security and the Director of National Intelligence release a statement directly saying that Russia is interfering in the 2016 election
October 31: "This WikiLeaks is like a treasure trove," Trump says on the campaign trail
November 4: "Boy, I love reading those WikiLeaks," Trump says from Ohio.
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SEE ALSO: US investigators reportedly wiretapped Paul Manafort before and after the election

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