The New York prosecutor investigating Trump's tax records is calling in reinforcements as the president's time in office comes to an end

• Forensic-accounting specialists have been brought on to help with the Manhattan District Attorney's Office's investigation into President Donald Trump's business transactions, The Washington Post reported.
• This is part of an investigation that's expanded since it was opened two years ago.
• District Attorney Cyrus R. Vance Jr. asked FTI Consulting to advise prosecutors on whether Trump or his company altered the value of some assets for tax purposes, The Post reported.

The Manhattan District Attorney's Office has tapped forensic-accounting specialists for help in its investigation into President Donald Trump's finances, The Washington Post reported on Tuesday.

District Attorney Cyrus R. Vance Jr. has expanded a 2018 investigation into hush money paid to two women who said they had affairs with Trump before he was president. Vance has asked FTI Consulting to look at some property deals and consult with prosecutors on whether Trump's company altered the value of some assets for tax breaks, The Post reported, citing a person with knowledge of the investigation.

Earlier this year, Vance asked a judge for access to eight years of Trump's tax records on the grounds that news reports had identified "extensive and protracted criminal conduct at the Trump Organization." Trump has fought the release of those records in court, while Vance has expanded the scope of the investigation.

Investigators in Vance's office recently interviewed bankers and insurers who work for the president, The New York Times reported this month. They spoke with employees of Trump's primary lender, Deutsche Bank, and Aon, his main insurer, The Times said.

Trump has expressed concern about the scope of the investigation as his presidency comes to an end.

"Now I hear that these same people that failed to get me in Washington have sent every piece of information to New York so that they can try to get me there," Trump said in a speech earlier this month. "It's all been gone over, over, and over again."

Jason Zirkle of the Association of Certified Fraud Examiners told The Post that Vance may have hired FTI to help counter any arguments that the investigation is driven by political animus.

The person with knowledge of the investigation told The Post that FTI's analysts had likely already reviewed some of Trump's dealings as part of a grand-jury investigation and could testify if criminal charges were filed.

Vance's office could not be reached for comment by phone. The Trump Organization did not reply to Insider's request for comment.