Insider has learned that the Manhattan District Attorney's office is preparing for a trial against the Trump Organization.

The district attorney's office requested a meeting with the former daughter-in-law of the CFO of the Trump Organization to discuss the case.

The district attorney's office brought its case because of the work done by Jen Weisselberg. In a May filing, prosecutors said that a media interview with her about untaxed fringe benefits at the company caused investigators to bring charges. A grand jury indicted her former father-in-law and former president's company for evading millions of dollars in taxes.

She is a key witness for the trial. She'll be helping to breathe life into the documents that they have. They are going to review the documents with her again and then she will testify.

The documents she gave to prosecutors were obtained through her divorce proceedings and from work she did for the Trump Organization. The indictment states that Trump personally signed tuition checks that were untaxed income.

She was present during the discussions about the payment. There were a lot of fringe benefits for her.

allen weisselberg court
The Trump Organization's Chief Financial Officer Allen Weisselberg, center, awaits a car after leaving a courtroom appearance in New York, Monday, Sept. 20, 2021.
AP Photo/Craig Ruttle

He wouldn't say if his client spoke to the Manhattan grand jury.

A representative for the Manhattan district attorney's office didn't reply immediately.

Lawyers for the Trump Organization and Allen Weisselberg have denied wrongdoing.

The trial date hasn't been set. The case will be heard in a New York court on July 12.

The Manhattan District Attorney's indictment against the Trump Organization and its CFO is part of a larger investigation into whether the former president's company broke tax, bank, and insurance laws.

There is a civil investigation going on in the office of the New York State Attorney General. James secured subpoenas for depositions from members of the Trump family, which appears to have moved at a faster pace.