He did not enter a plea.
The indictment doesn't accuse any campaign officials of wrongdoing or say that they coordinated directly with WikiLeaks. He has known Trump for decades, pushing him to run for president as far back as 1998 after seeing in the NY celebrity developer the potent political combination of charisma, money and controversy.
He had urged Trump to run for president since 1988, was chairman of his presidential exploratory committee in 2000 and was a consultant when Trump considered running in 2012, according to Stone's 2017 book about Trump's campaign for the White House. That fed questions about his Trump campaign contacts with WikiLeaks during the campaign and into possible coordination in disseminating the emails, which US intelligence officials say were stolen by Russian Federation.
Roger Stone, Trump's longest-serving political advisor, has been arrested in Fort Lauderdale, Florida, for lying to the investigators with regards to Mueller's Russian Federation probe. He was arrested by the FBI Friday morning at his home in Florida, his lawyer tells CNN.
Stone could then be seen in the doorway in his sleepwear before he was led away, CNN reported. Stone had been predicting his indictment for some time.
Mr Stone then emerged from court grinning broadly while flashing a Nixonian double V-sign and wearing a blue Ralph Lauren polo shirt.
Stone is the sixth Trump aide or adviser charged by Mueller and the 34th person overall.
This is arguably the biggest fish Mueller has caught in his net since the Russian investigation started: although Stone didn't hold an official position for most of the 2016 campaign, he's still Trump's longest-serving political advisor.
The list also includes his former presidential campaign chair, Paul Manafort, and Manafort's colleague, Rick Gates, former national security adviser Michael Flynn and campaign foreign policy adviser George Papadopoulos.
He also affirmed that he does not plan to testify against Trump, but would not say if he seeks a pardon from the president.
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It was vintage Roger Stone: The longtime Republican operative flashed a Nixonesque double-armed victory sign after being indicted Friday for lying to federal investigators.
After Wikileaks released the first load of Podesta emails, the indictment reads, the same Trump campaign official texted Stone: "Well done".
The indictment reveals that a "senior official" on the Trump 2016 campaign asked Stone to inquire with Wikileaks about possible impending releases of damaging information on Hillary Clinton in July 2016.
Mueller's indictment also describes how a "high-ranking Trump campaign official" was in touch with Stone in October 2016 ahead of the release of additional damaging information about Clinton's campaign by WikiLeaks.
His activities have always been scrutinised by both the Federal Bureau of Investigation and the Senate, and the charges are linked to an alleged Russian-led hack into the emails of Democratic Party officials during the 2016 presidential campaign.
The indictment does not name the official or say who directed the outreach to Stone. "STONE thereafter told the Trump Campaign about potential future releases of damaging material by [Wikileaks]". And news that Stone had threatened a dog - which, to be clear, is a supporting detail in the indictment and not itself cited as a crime - quickly made Bianca a star on Twitter, where she was cast as a blameless victim of a cruel threat.
A self-described "agent provocateur" of the American right and Republican veteran of Washington and New York City politics, Stone has a tattoo of the face of late president Richard Nixon on his back.
Mueller also alleges that Stone attempted to persuade another witness, radio host Randy Credico, to provide false testimony to the committee. On or about the same day, STONE wrote to Person 2, "I am so ready".