Conservative author Jerome Corsi on Monday filed a “criminal and ethics complaint” against Special Counsel Robert Mueller’s team, accusing investigators of trying to bully him into giving “false testimony” against President Trump.

The complaint, which Corsi had threatened for days, is the latest escalation between Mueller’s team and its investigation targets.

The 78-page document, asserting the existence of a “slow-motion coup against the president,” was filed to a range of top law enforcement officials including Acting Attorney General Matthew Whitaker, DOJ Inspector General Michael Horowitz, D.C.’s U.S. Attorney Jessie Liu and the Bar Disciplinary Counsel.

“Dr. Corsi has been criminally threatened and coerced to tell a lie and call it the truth,” the complaint states.

Corsi, who wrote the anti-President Obama book "The Obama Nation" and is connected with political operative Roger Stone, has claimed for the past week that he was being improperly pressured by Mueller’s team to strike a plea deal which he now says he won’t sign.

According to Corsi’s complaint, they wanted him to demonstrate that he acted as a liaison between Stone and WikiLeaks founder Julian Assange on one side and the Trump campaign on the other, regarding the release of hacked emails from the Democratic National Committee.

The complaint states that Mueller’s office is now “knowingly and deceitfully threatening to charge Dr. Corsi with an alleged false statement,” unless he gives them “false testimony” against Trump and others.

The purported threat of a false statement charge, according to the complaint, pertains to a July 2016 email from Stone asking him to “get to” Assange and get the pending emails.

Corsi’s complaint says he was unable to initially give “accurate” testimony on that point, until he could reload emails on his laptop. The complaint says he later amended his answers. In an interview last week with Fox News’ "Tucker Carlson Tonight," Corsi said Mueller’s team “was happy” with his answers until he couldn’t “give them what they wanted.”

Asked about Monday's complaint, Mueller spokesman Peter Carr said they would decline to comment, as did a Justice Department spokesman.

READ: JEROME CORSI’S COMPLAINT AGAINST SPECIAL COUNSEL ROBERT MUELLER

As part of the complaint, Corsi’s legal team included a draft court filing from Mueller’s team to be used for Corsi to plead guilty to making false statements.

That document includes an Aug. 2, 2016 email between Corsi and Stone, where Corsi references Assange and the forthcoming release of hacked emails.

“Word is friend in embassy plans 2 more dumps,” Corsi wrote to Stone, about 10 weeks before Hillary Clinton campaign chairman John Podesta’s emails were released.

In the complaint on Monday, Corsi’s lawyers denied that Corsi had inside knowledge and was colluding with Assange. Instead, they make the argument Corsi “logically concluded” more emails would be released.

“Employing his professional skills and considerable experience as an analyst and investigative journalist, Dr. Corsi logically concluded that WikiLeaks would release Podesta’s emails soon in a second round ‘data dump’ from the same group of DNC emails stolen on July 5, 2016,” the complaint reads.

Corsi, the onetime Washington bureau chief of the right-wing website Infowars, told host Tucker Carlson last week that he has had "no contact with Julian Assange whatsoever."

The complaint is the latest sign of turbulence between Mueller’s team and investigation targets and witnesses. The team recently accused ex-Trump campaign chairman Paul Manafort of breaching his plea deal by lying to investigators.

Meanwhile, the special counsel’s office stunned Washington with the revelation last week that it had struck a plea deal with former Trump personal attorney Michael Cohen, who is speaking to investigators about Trump’s real estate pursuits in Russia among other topics.

While Trump maintained his stance that there is no collusion and blasted Mueller’s investigation in stark terms last week, the developments showed the probe focusing more closely on Trump himself.

Corsi is represented in his complaint by Larry Klayman, a conservative lawyer who founded Judicial Watch and is known for filing lawsuits against former President Bill Clinton. In the complaint, Klayman argues that the activities of Corsi, as an "investigative journalist," are protected by the First Amendment to the Constitution.

Fox News’ Samuel Chamberlain and The Associated Press contributed to this report.