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Investigators from the Manhattan District Attorney's office picked up the pace of their investigation into Donald Trump's finances shortly after he left office, a cooperating witness in the case told Insider.

Jennifer Weisselberg said she's spoken with Mark Pomerantz, a recent hire in the office with experience prosecuting mob members, "three or four times" since he joined the district attorney's team.

It's the latest indication that the investigation is heating up and may be entering its final stretch. Manhattan District Attorney Cyrus Vance Jr. hired Pomerantz to join the team in early February, shortly after Trump left office.

Weisselberg said she has been cooperating with prosecutors since September, when she first spoke to investigators in the New York Attorney General's office, which is running a separate, parallel investigation.

The Attorney General's Office initially asked her only a few questions, she said, but then returned after the publication of a Bloomberg News article based on financial documents in her possession about the Trump Organization's unusual financial arrangements with the Weisselberg family.

"Since the Bloomberg article came out — I don't think they realized that I had that stuff," Weisselberg told Insider. "The AG came and they started picking up more boxes."

Prosecutors in both the New York Attorney General's office and the Manhattan District Attorney's office are interested in Jennifer Weisselberg through her relationship with Allen Weisselberg, the longtime CFO of the Trump Organization and manager of the family's finances.

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Representatives for the Trump Organization didn't immediately respond to a request for comment for this story. Representatives for Allen Weisselberg, the Manhattan DA's office, and the New York Attorney General's office declined to comment.

'They want you to do crimes and not talk about it'

From 2004 and 2018, Jennifer Weisselberg was married to Barry Weisselberg, Allen Weisselberg's son and another key employee of the Trump Organization. The Manhattan District Attorney's Office successfully subpoenaed the Trump Organization's tax returns and reams of other financial documents from the company earlier this year. They want Allen Weisselberg to cooperate with them and help guide them through the documents, the Washington Post reported.

It's part of a wide-ranging investigation into the Trump Organization's and Donald Trump's finances, which was stalled during much of his presidency.

Court filings reviewed by Insider suggest the office is looking into whether the Trump Organization kept two sets of books — one that may have showed its finances were in good shape for favorable loan terms, and another that may have showed its finances were in bad shape so that it could pay little in taxes.

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Jennifer Weisselberg said prosecutors were interested in more than just flipping Allen Weisselberg for the investigation.

"They took depositions, they took checks, routing numbers, bank account [information], and things like that," she said.

In addition to managing the Trump family finances, Allen Weisselberg also managed the finances for her and her ex-husband Barry, Jennifer Weisselberg told Insider. Prosecutors may be able to tell whether Allen Weisselberg distorted the Trump Organization's financial picture if they compare payroll information and tax filings among Jennifer Weisselberg's documents to the documents the Trump Organization filed with the IRS and state tax authorities.

Prosecutors are also interested in an apartment Donald Trump gave to Barry and Jennifer Weisselberg as a wedding gift. The apartment, at the Trump Parc East building, would have cost them hundreds of thousands of dollars if the couple paid the market rate.

Instead, Jennifer Weisselberg said, the couple paid just $400 or so per month in utilities. Prosecutors are looking into whether Barry Weisselberg miscategorized the apartment on his tax filings in a way that broke tax laws, according to the Washington Post.

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Jennifer Weisselberg said the Trump Organization rarely gave her ex-husband raises during the roughly 20 years he's worked there. She said Trump gave employees apartments and paid for their children's tuition instead, which she thinks offers him a degree of control over their lives. She said prosecutors in both the district attorney's and attorney general's office have asked her about that.

"They want you to do crimes and not talk about it and don't leave," she said. "It's so controlling. And both agencies have discussed that, because they need to know how they operate."

The DA's office sent a forensic accountant with experience analyzing mob finances, Weisselberg said

Jennifer Weisselberg first began speaking with prosecutors in the district attorney's office in the fall, shortly after she met with investigators in the state attorney general's office, she said.

In addition to several interviews with Pomerantz, she said the office sent a forensic accountant with experience analyzing mob finances to look at the documents in her possession. Pomerantz, a renowned white-collar attorney, also led the prosecution of John Gotti's son.

Mark Pomerantz

Jennifer Weisselberg said she had those "seven boxes of documents" in her possession through her divorce. The judge, she said, ordered them to be subpoenaed from Barry Weisselberg and forced him to sit for a deposition.

"The judge said there was a lot of imputed money," she said. "They subpoenaed a lot of things after Barry's deposition."

She said that accusations that she is only working with prosecutors as an extension of her divorce disputes are wrong.

"When the DA's office calls, I don't have an option," she said. "If I didn't, I'd be subpoenaed. They called me."

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