The People of the State of New York v. Donald J. Trump, et al, is scheduled to get underway in lower Manhattan at 10 a.m. with opening statements.

If opening statements are completed before the end of the day, the New York attorney general plans to begin her case by calling Trump's former Mazars USA accountant Donald Bender to the stand.

Mazars severed its business relationship with the former president last year after learning of the attorney general's findings during the AG's probe.

Though Trump has denied all wrongdoing alleged by the attorney general, Judge Arthur Engoron has already decided the central allegation against Trump and his co-defendants, ruling in a pretrial hearing last week that the AG had provided "conclusive evidence" that Trump overvalued his assets between $812 million and $2.2 billion.

The judge then canceled the Trump Organization's business certificates in New York, severely restricting Trump's ability to conduct business in the state moving forward -- a move that Trump attorney Alina Habba called "nonsensical" and "outrageously overreaching."

"In defendants' world: rent regulated apartments are worth the same as unregulated apartments; restricted land is worth the same as unrestricted land; restrictions can evaporate into thin air," Engoron wrote, citing multiple arguments made by defense to justify the allegedly inflated valuations of Trump's assets. "That is a fantasy world, not the real world."

Among the issues still to be determined at trial: What additional penalties Trump might face, and what might happen with the multiple causes of action included in the attorney general's suit.

Former President Donald Trump stepped up his attacks on the judge overseeing and deciding his case, writing on Truth Social overnight that Justice Arthur Engoron should resign and be sanctioned for "abuse of power."

Similar to an earlier post, Trump criticized allegations regarding the value of his Mar-a-Lago estate, in addition to an appellate court's ruling that his lawyers unsuccessfully tried to use to limit the timeframe of the case.

Former President Trump posted on his Truth Social platform Sunday night that he intends to attend the opening of the trial.

"See you in court -- Monday morning," he wrote in a post.

Earlier Sunday, multiple sources familiar with the decision told ABC News that Trump was expecting to attend.

Trump will have no speaking role in court on Monday, but it is anticipated that he'll return to the courthouse toward the end of the state's case when court records show he will be called as a witness.

Former President Donald Trump must pay $354 million for fraudulent business practices, Judge Arthur Engoron has ruled.

Trump's sons Donald Trump Jr. and Eric Trump have been fined $4 million apiece, and former Trump Organization CFO Allen Weisselberg has been fined $1 million.

The decision bars Trump barred from serving as an officer of a New York company for three years, and bars his sons for two years apiece.

Regarding the dissolution of Trump's companies, the decision says, "This Court hereby modifies its September 26, 2023, Decision and Order solely to the extent of removing the language ordering the LLCs cancellation en masse. The restructuring and potential dissolution of any LLCs shall be subject to individual review by the Court appointed Independent Director of Compliance in consultation with Judge Jones."

In his decision, Engoron wrote that "Defendants' refusal to admit error -- indeed, to continue it, according to the Independent Monitor -- constrains this Court to conclude that they will engage in it going forward unless judicially restrained."

"Overall, Donald Trump rarely responded to the questions asked, and he frequently interjected long, irrelevant speeches on issues far beyond the scope of the trial," the judge wrote. "His refusal to answer the questions directly, or in some cases, at all, severely compromised his credibility."

"The accountants created these 'compilations' based on data submitted by the Trump entities," the decision said. "In order to borrow more and at lower rates, defendants submitted blatantly false financial data to the accountants, resulting in fraudulent financial statements. When confronted at trial with the statements, defendants' fact and expert witnesses simply denied reality, and defendants failed to accept responsibility or to impose internal controls to prevent future recurrences."

Of Donald Trump Jr., Engoron wrote, "Despite disclaiming responsibility for or knowledge of the Statements of Financial Conditions' contents, Trump, Jr. still insisted that the Statements of Financial Condition were 'materially accurate.'"

Engoron's decision follows an 11-week civil trial in New York, where Trump and three of his adult children testified.

New York Attorney General Letitia James sued Trump, his two adult sons, and Trump Organization executives in September 2022 for issuing fraudulent financial statements -- including over 200 false and misleading asset values between 2011 and 2021 -- to get better loan terms and business deals.