Former Trump Organization executive Allen Weisselberg has been granted immunity by federal prosecutors in exchange for his cooperation in the investigation of Michael Cohen, President Donald Trump’s former personal lawyer. Weisselberg’s immunity deal was revealed on Friday, the same day Cohen pleaded guilty to charges including campaign finance violations, tax evasion, and making false statements to a financial institution.

Weisselberg’s immunity could be a significant development in the case, as he is believed to have extensive knowledge of the Trump Organization’s financial dealings. As the organization’s chief financial officer, Weisselberg would have been involved in many of the company’s most sensitive and important transactions. His cooperation could provide prosecutors with valuable information about any potential wrongdoing on the part of the president or his associates.

In addition to Weisselberg’s cooperation, prosecutors have reportedly obtained a trove of documents from Cohen, including records related to the hush money payments he made to two women who claim to have had affairs with Trump. The payments, which were made shortly before the 2016 presidential election, have raised questions about whether they constituted illegal campaign contributions.

Trump has denied any wrongdoing and has sought to distance himself from the legal troubles facing Cohen and others in his orbit. However, the mounting legal challenges have put increasing pressure on the president and his inner circle, and the granting of immunity to Weisselberg suggests that prosecutors may be getting closer to uncovering the truth about the president’s involvement in the hush money payments.

The investigation into Cohen and the Trump Organization is ongoing, and it remains to be seen what further developments may arise. However, with Weisselberg now cooperating with prosecutors, the pressure on Trump and his allies is likely to only increase in the coming months.