An attorney linked to a former Trump campaign official admitted Tuesday he lied to federal investigators working for special counsel Robert Mueller.

Alex van der Zwaan, who worked at the law firm Skadden, Arps, Slate, Meagher & Flom until he was fired last year, appeared at the federal courthouse in Washington where he formally pleaded guilty to a single charge of making false statements about his interactions with former Trump campaign aide Rick Gates.

Associated Press reporter Eric Tucker says Mueller is sending a clear message that he won't tolerate lying. This is the 4th person to be prosecuted for lying to investigators.

Van der Zwaan's plea comes on the heels of an extraordinary indictment from Mueller last week that charged 13 Russian individuals and three Russian companies in a hidden social media effort to meddle in the 2016 U.S. presidential election by denigrating Democrat Hillary Clinton and boosting the chances of Trump.

But the charge against the attorney, who is also the son-in-law of a Russian billionaire, does not involve election meddling or relate to the Trump campaign's operations. Instead, it stems from the special counsel's investigation into Paul Manafort, Trump's former campaign chair, and Gates, who is a longtime business associate of Manafort.

Gates and Manafort were indicted last year and accused of conspiring to launder millions of dollars they earned from political consulting work in Ukraine. As part of that indictment, Manafort and Gates are accused of directing a covert Washington lobbying campaign on behalf of pro-Russian Ukrainian interests before they joined the Trump campaign. Both have pleaded not guilty.

Van der Zwaan, 33, of London admitted to lying to federal authorities while they questioned him about the production of a report that Manafort and Gates are accused of secretly funding by funneling money through an offshore account.

Washington - 20 February 2018

1. STILL Alex van der Zwaan arriving at the courthouse

2. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"Today we had another guilty plea in special counsel Robert Mueller's investigation. This is a lawyer. His name is Alex van der Zwaan. He admitted to lying to federal investigators during an interview in November 2017."

3. STILL Alex van der Zwaan arriving at the courthouse

4. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"This is the 19th person that we've seen charged so far in Mueller's investigation. This is a person who lied to the FBI about his interactions with Rick Gates, who is a codefendant of Paul Manafort, who is the former campaign chairman of President Donald Trump."

5. STILL Alex van der Zwaan arriving at the courthouse

6. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"He went into the special counsel's office back in November 2017 to be interviewed about his interactions with Rick Gates in connection with the production of a report that related to foreign lobbying work, Ukrainian lobbying work, that Rick Gates and Paul Manafort were doing. And during the course of that conversation he was asked about the last interaction he had with Rick Gates. He lied in that interview according to Mueller's investigators."

7. Mid, van der Zwaan exiting the courthouse and getting into a car

8. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"So one thing that's really interesting is when you think about the timing of this investigation, this comes right on the heels of a stunning indictment that we had last Friday against 13 Russians and 3 Russian companies in connection to a hidden but very powerful social media effort that Mueller says was aimed at denigrating Hillary Clinton during the 2016 presidential election and aiding the campaign of her Republican opponent Donald Trump."

9. Mid, car driving away

10. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"The plea today does not relate to the indictment from Friday about the meddling in the 2016 presidential election. And it doesn't directly connect in any way to President Trump or Candidate Trump."

11. STILL van der Zwaan leaving the courthouse

12. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"But I would say what's really interesting now is this is the fourth person who we have seen charged with lying to investigators. So clearly Mueller is saying if you lie to us, and if we catch you in a lie making a knowing and false and willfully false statement, not just a mistake but a willfully false statement, you could wind up being prosecuted."

13. STILL van der Zwaan leaving the courthouse

14. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"Alex van der Zwaan is going to be sentenced in April. He was free today, he was allowed to go, allowed to leave the courtroom."

15. STILL van der Zwaan leaving the courthouse

16.SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"That charge that he is pleading guilty to, a charge of making false statements to investigators, technically carries a five year maximum prison sentence. However, under the sentencing guideline ranges that were discussed in court today he's looking at between zero months and six months in prison."

++EDIT ENDS IN A SOUNDBITE++

Thirteen Russians and three Russian entities were charged Friday with an elaborate plot to interfere in the 2016 U.S. presidential election, federal prosecutors announced Friday.

The indictment, brought by the office of special counsel Robert Mueller, alleges that Russians used bogus social media postings and advertisements fraudulently purchased in the name of Americans to sway political opinion during the race between Republican Donald Trump and Hillary Clinton, his Democratic opponent.

The charges are the most direct allegation to date of illegal Russian meddling in the election.

The goal, the indictment says, was to "sow discord in the U.S. political system, including the 2016 presidential election."

Charges include conspiracy, wire fraud, bank fraud and aggravated identity theft.

The charges arise from Mueller's investigation into Russian interference in the election and whether there was improper coordination between the Trump campaign and the Kremlin.

Before Friday, four people, including Trump's former national security adviser and former campaign chairman, had been charged in Mueller's investigation.

The White House had no immediate response to the indictment.

Washington DC - 16 February 2018

1. Wide, Rosenstein walking into news conference

2. SOUNDBITE (English) Rod Rosenstein, Deputy Attorney General:

"A grand jury in the District of Columbia today returned an indictment presented by the special counsel's office. The indictment charges 13 Russian nationals and three Russian companies for committing federal crimes while seeking to interfere in the United States political system including the 2016 presidential election. The defendants allegedly conducted what they called information warfare against the United States with the stated goal of spreading distrust toward the candidates and the political system in general. According to the allegations in the indictment 12 of the individual defendants worked at various times for a company called Internet Research Agency LLC, a Russian company based in St. Petersburg. The other individual defendant Yevgeny Viktorovich Prigozhin funded the conspiracy through companies known as Concord Management and Consulting LLC, Concord catering and many affiliates and subsidiaries.

3. Cutaway reporters

4. SOUNDBITE (English) Rod Rosenstein, Deputy Attorney General:

"Two of the defendants allegedly traveled to the United States in 2014 to collect intelligence for their American influence operations. In order to hide the Russian origins of their activities, the defendants allegedly purchased space on computer servers located here in the United States in order to set up a virtual private network. The defendants allegedly use that infrastructure to establish hundreds of accounts on social media networks such as Facebook, Instagram and Twitter, making it appear that those accounts were controlled by persons located in the United States."

5. Wide, Rosenstein speaking

6. SOUNDBITE (English) Rod Rosenstein, Deputy Attorney General:

"The indictment includes eight criminal counts. Count one alleges a criminal conspiracy to defraud the United States by all of the defendants. The defendants allegedly conspired to defraud America by impairing the lawful functions of the Federal Election Commission, the United States Department of Justice and the Department of State. Those organizations of the U.S. government are responsible for administering federal requirements for disclosure of foreign involvement in certain domestic activities. Count two charges conspiracy to commit wire fraud and bank fraud by Internet Research Agency and two of the individual defendants. Counts three through eight charge aggravated identity theft by Internet Research Agency and four individuals. Now there is no allegation in this indictment that any American was a knowing participant in this illegal activity. There is no allegation in the indictment that the charge conduct altered the outcome of the 2016 election. I want to caution you that everyone charged with a crime is presumed innocent unless and until proven guilty in court. At trial prosecutors must introduce credible evidence that is sufficient to prove each defendant guilty beyond any reasonable doubt to a unanimous jury. Special Counsel's investigation is ongoing. There will be no comments from the special counsel at this time. "

7. Cutaway

8. SOUNDBITE (English) Rod Rosenstein, Deputy Attorney General

"This indictment serves as a reminder that people are not always who they appear to be on the Internet. The indictment alleges that the Russian conspirators want to promote discord in the United States and undermine public confidence in democracy. We must not allow them to succeed. The Department of Justice will continue to work cooperatively with other law enforcement and intelligence agencies and with the Congress to defend our nation against similar current and future efforts."

9. Mid, Rosenstein walking out

Thirteen Russians and three Russian entities were charged Friday with an elaborate plot to interfere in the 2016 U.S. presidential election, federal prosecutors announced Friday.

The indictment, brought by the office of special counsel Robert Mueller, alleges that Russians used bogus social media postings and advertisements fraudulently purchased in the name of Americans to sway political opinion during the race between Republican Donald Trump and Hillary Clinton, his Democratic opponent.

The charges are the most direct allegation to date of illegal Russian meddling in the election.

The goal, the indictment says, was to "sow discord in the U.S. political system, including the 2016 presidential election."

Charges include conspiracy, wire fraud, bank fraud and aggravated identity theft.

The charges arise from Mueller's investigation into Russian interference in the election and whether there was improper coordination between the Trump campaign and the Kremlin.

Before Friday, four people, including Trump's former national security adviser and former campaign chairman, had been charged in Mueller's investigation.

The White House had no immediate response to the indictment.

Washington - 16 February 2018

1. Wide, Rosenstein walking into news conference

2. SOUNDBITE (English) Rod Rosenstein, Deputy Attorney General:

"A grand jury in the District of Columbia today returned an indictment presented by the special counsel's office. The indictment charges 13 Russian nationals and three Russian companies for committing federal crimes while seeking to interfere in the United States political system including the 2016 presidential election. The defendants allegedly conducted what they called information warfare against the United States with the stated goal of spreading distrust toward the candidates and the political system in general. According to the allegations in the indictment 12 of the individual defendants worked at various times for a company called Internet Research Agency LLC, a Russian company based in St. Petersburg. The other individual defendant Yevgeny Viktorovich Prigozhin funded the conspiracy through companies known as Concord Management and Consulting LLC, Concord catering and many affiliates and subsidiaries.

3. Cutaway reporters

4. SOUNDBITE (English) Rod Rosenstein, Deputy Attorney General:

"Two of the defendants allegedly traveled to the United States in 2014 to collect intelligence for their American influence operations. In order to hide the Russian origins of their activities, the defendants allegedly purchased space on computer servers located here in the United States in order to set up a virtual private network. The defendants allegedly use that infrastructure to establish hundreds of accounts on social media networks such as Facebook, Instagram and Twitter, making it appear that those accounts were controlled by persons located in the United States."

5. Wide, Rosenstein speaking

6. SOUNDBITE (English) Rod Rosenstein, Deputy Attorney General:

"The indictment includes eight criminal counts. Count one alleges a criminal conspiracy to defraud the United States by all of the defendants. The defendants allegedly conspired to defraud America by impairing the lawful functions of the Federal Election Commission, the United States Department of Justice and the Department of State. Those organizations of the U.S. government are responsible for administering federal requirements for disclosure of foreign involvement in certain domestic activities. Count two charges conspiracy to commit wire fraud and bank fraud by Internet Research Agency and two of the individual defendants. Counts three through eight charge aggravated identity theft by Internet Research Agency and four individuals. Now there is no allegation in this indictment that any American was a knowing participant in this illegal activity. There is no allegation in the indictment that the charge conduct altered the outcome of the 2016 election. I want to caution you that everyone charged with a crime is presumed innocent unless and until proven guilty in court. At trial prosecutors must introduce credible evidence that is sufficient to prove each defendant guilty beyond any reasonable doubt to a unanimous jury. Special Counsel's investigation is ongoing. There will be no comments from the special counsel at this time. "

7. Cutaway

8. SOUNDBITE (English) Rod Rosenstein, Deputy Attorney General

"This indictment serves as a reminder that people are not always who they appear to be on the Internet. The indictment alleges that the Russian conspirators want to promote discord in the United States and undermine public confidence in democracy. We must not allow them to succeed. The Department of Justice will continue to work cooperatively with other law enforcement and intelligence agencies and with the Congress to defend our nation against similar current and future efforts."

9. Mid, Rosenstein walking out

An attorney linked to a former Trump campaign official admitted Tuesday he lied to federal investigators working for special counsel Robert Mueller.

Alex van der Zwaan, who worked at the law firm Skadden, Arps, Slate, Meagher & Flom until he was fired last year, appeared at the federal courthouse in Washington where he formally pleaded guilty to a single charge of making false statements about his interactions with former Trump campaign aide Rick Gates.

Associated Press reporter Eric Tucker says Mueller is sending a clear message that he won't tolerate lying. This is the 4th person to be prosecuted for lying to investigators.

Van der Zwaan's plea comes on the heels of an extraordinary indictment from Mueller last week that charged 13 Russian individuals and three Russian companies in a hidden social media effort to meddle in the 2016 U.S. presidential election by denigrating Democrat Hillary Clinton and boosting the chances of Trump.

But the charge against the attorney, who is also the son-in-law of a Russian billionaire, does not involve election meddling or relate to the Trump campaign's operations. Instead, it stems from the special counsel's investigation into Paul Manafort, Trump's former campaign chair, and Gates, who is a longtime business associate of Manafort.

Gates and Manafort were indicted last year and accused of conspiring to launder millions of dollars they earned from political consulting work in Ukraine. As part of that indictment, Manafort and Gates are accused of directing a covert Washington lobbying campaign on behalf of pro-Russian Ukrainian interests before they joined the Trump campaign. Both have pleaded not guilty.

Van der Zwaan, 33, of London admitted to lying to federal authorities while they questioned him about the production of a report that Manafort and Gates are accused of secretly funding by funneling money through an offshore account.

Washington - 20 February 2018

1. STILL Alex van der Zwaan arriving at the courthouse

2. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"Today we had another guilty plea in special counsel Robert Mueller's investigation. This is a lawyer. His name is Alex van der Zwaan. He admitted to lying to federal investigators during an interview in November 2017."

3. STILL Alex van der Zwaan arriving at the courthouse

4. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"This is the 19th person that we've seen charged so far in Mueller's investigation. This is a person who lied to the FBI about his interactions with Rick Gates, who is a codefendant of Paul Manafort, who is the former campaign chairman of President Donald Trump."

5. STILL Alex van der Zwaan arriving at the courthouse

6. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"He went into the special counsel's office back in November 2017 to be interviewed about his interactions with Rick Gates in connection with the production of a report that related to foreign lobbying work, Ukrainian lobbying work, that Rick Gates and Paul Manafort were doing. And during the course of that conversation he was asked about the last interaction he had with Rick Gates. He lied in that interview according to Mueller's investigators."

7. Mid, van der Zwaan exiting the courthouse and getting into a car

8. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"So one thing that's really interesting is when you think about the timing of this investigation, this comes right on the heels of a stunning indictment that we had last Friday against 13 Russians and 3 Russian companies in connection to a hidden but very powerful social media effort that Mueller says was aimed at denigrating Hillary Clinton during the 2016 presidential election and aiding the campaign of her Republican opponent Donald Trump."

9. Mid, car driving away

10. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"The plea today does not relate to the indictment from Friday about the meddling in the 2016 presidential election. And it doesn't directly connect in any way to President Trump or Candidate Trump."

11. STILL van der Zwaan leaving the courthouse

12. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"But I would say what's really interesting now is this is the fourth person who we have seen charged with lying to investigators. So clearly Mueller is saying if you lie to us, and if we catch you in a lie making a knowing and false and willfully false statement, not just a mistake but a willfully false statement, you could wind up being prosecuted."

13. STILL van der Zwaan leaving the courthouse

14. SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"Alex van der Zwaan is going to be sentenced in April. He was free today, he was allowed to go, allowed to leave the courtroom."

15. STILL van der Zwaan leaving the courthouse

16.SOUNDBITE (English) Eric Tucker, Associated Press Justice Department Reporter:

"That charge that he is pleading guilty to, a charge of making false statements to investigators, technically carries a five year maximum prison sentence. However, under the sentencing guideline ranges that were discussed in court today he's looking at between zero months and six months in prison."

++EDIT ENDS IN A SOUNDBITE++