On Michael Cohen, Donald Trump's former lawyer and self-described "fixer," Judge Engoron wrote in his ruling that he found the star witness to be a credible witness despite having been convicted of perjury.

"His testimony was significantly compromised by his having pleaded guilty to perjury and by some seeming contradictions in what he said at trial," Engoron wrote. "However, carefully parsed, he testified that although Donald Trump did not expressly direct him to reverse engineer financial statements, he ordered him to do so indirectly, in his 'mob voice.'"

Engoron continued that although the "animosity between the witness and the defendant is palpable, providing Cohen with an incentive to lie, the Court found his testimony credible, based on the relaxed manner in which he testified, the general plausibility of his statements, and, most importantly, the way his testimony was corroborated by other trial evidence."

A "less-forgiving factfinder" might have come to a different conclusion and not believed "a single word of a convicted perjurer," Engoron wrote.

"This factfinder does not believe that pleading guilty to perjury means that you can never tell the truth," he continued. "Michael Cohen told the truth."

Cohen, who pleaded guilty in 2018 to lying to Congress about the Russia probe, addressed the passage on social media, writing on X, "Judge Engoron's determination regarding my veracity at the NYAG Trump civil fraud trial. Michael Cohen told the truth!"

Members of the Trump family and their attorneys roundly called the ruling unjust and indicated they plan to appeal.

Eric Trump told ABC News the judgment against him and his family is "a total joke" and "insane." He said the family will immediately appeal the ruling, which he said shows the court and the attorney general in his opinion are "living in an alternate universe."

Donald Trump Jr. accused the case of being politically motivated.

"We've reached the point where your political beliefs combined with what venue your case is heard are the primary determinants of the outcome; not the facts of the case!" he said in a statement to ABC News.

Donald Trump's lawyer, Chris Kise, also claimed the case was an "unjust political crusade" against the leading Republican presidential candidate and that there was no evidence of fraud.

"Hard to imagine a more unfair process and hard to believe this is happening in America," Kise said, adding that the former president "will of course appeal."

Donald Trump's legal spokesperson, Alina Habba, called the verdict a "manifest injustice" and the "culmination of a multi-year, politically fueled witch hunt."

"Countless hours of testimony proved that there was no wrongdoing, no crime, and no victim," Habba said in a statement. "Given the grave stakes, we trust that the Appellate Division will overturn this egregious verdict and end this relentless persecution against my clients."

The Trump Organization also said the ruling was a "gross miscarriage of justice."

"Every member of the New York business community, no matter the industry, should be gravely concerned with this gross overreach and brazen attempt by the Attorney General to exert limitless power where no private or public harm has been established," a spokesperson said in a statement. "If allowed to stand, this ruling will only further expedite the continuing exodus of companies from New York."

Judge Engoron took direct aim at several of the Trumps' core defenses, including Trump's claim that real estate appraisal is imprecise and subjective, and that property valuations reflect nuances in the market that only sophisticated practitioners can understand.

Engoron called that argument a "great red herring in this case."

"True enough, as appraising is an art as well as a science," Engoron wrote. "However, the science part cannot be fraudulent. When two appraisals rely on starkly different assumptions, that is not evidence of a difference of opinion, that is evidence of deceit."

Engoron also undercut a common refrain from defendants' that their accountants were responsible for maintaining above-board business practices.

In a section of his ruling titled, "Blame the Accountants," Engoron wrote that, "There is overwhelming evidence … that the buck for being truthful in the supporting data valuations stopped with the Trump Organization, not the accountants."

As court resumed after the lunch break, Judge Engoron admonished Donald Trump for a post he made this afternoon on his Truth Social platform regarding Engoron's clerk, Alison Greenfield.

"Personal attacks on members of my court staff are unacceptable and inappropriate. Consider this statement a gag order forbidding all parties from posting, emailing or speaking publicly about any of my staff," the judge said in his admonishment.

The post, which included a photo of Greenfield with Senate Majority Leader Chuck Schumer, made unsubstantiated claims about her connections with Schumer and falsely claimed that Greenfield is "running" the case against Trump.

Trump apparently made the post, which linked to Greenfield's Instagram account, while the former president was sitting in the courtroom.

The post was deleted shortly before the judge's admonishment, but it was up for at least an hour and a half. Engoron lamented that the sentiment was shared to millions.

The judge did not mention Trump by name but noted the post came from one of the defendants.

Greenfield sits at the bench to Engoron's immediate right and the judge is often seen conferring with her over legal and logistical matters.

In a statement, Schumer spokesperson Allison Biasotti called Trump's post "ridiculous, absurd, and false," saying that "Sen. Schumer does not know Ms. Greenfield. As is well known, Sen. Schumer attends countless events in every corner of the state where tens of thousands of constituents take photos with him, just like this one, which was taken at a stop at an annual brunch in Manhattan.”

-ABC News' Peter Charalambous, Aaron Katersky, Soo Rin Kim, Lalee Ibssa and Kendall Ross