WASHINGTON — Roger Stone, the longtime ally of President Trump's who was arrested by the FBI in Florida last week, has pleaded not guilty in a federal court in Washington.

Stone was indicted on charges of obstruction, making false statements (including to Congress), and witness tampering as part of Special Counsel Robert Mueller's Russia investigation.

Stone made no statements as he arrived at the courthouse Tuesday. He waved to supporters and largely ignored a group of protesters yelling "lock him up."

While the indictment doesn't accuse Stone of coordinating with Russia or Wikileaks in the release of hacked emails during the 2016 election, it does say he misled lawmakers about his pursuit of those emails.

It also accuses him of threatening another witness in the case to keep their stories consistent in Congressional testimony.

Last week the FBI raided Stone's Fort Lauderdale home and arrested him. Stone was granted a $250,000 surety bond, allowing him to walk out of the federal court after his first appearance.

Stone maintains his innocence in the charges, and says he will never turn on President Trump.