The development suggests that the Manhattan district attorney's office is poised to transition from collecting evidence to presenting what is likely a complex case to a grand jury, one that could result in the jury considering criminal charges... Prosecutors have also been closely examining the finances of Trump Organization CFO Allen Weisselberg, as well as benefits received from the company by him and his son Barry, a longtime employee of the Trump Organization, CNN has reported. ABC was first to report on a witness being contacted. The Washington Post reported Tuesday that the grand jury Vance's office has convened is a special grand jury. This type of grand jury is typically used to hear complex, long-term fraud and corruption cases. A special grand jury sits longer than a standard grand jury -- usually three to six months, versus just one -- and, if needed, the jurors can vote to extend its term even further.