After a nearly two year investigation, the former leaders of Dewey & LeBoeuf, ex-chairman, Steven Davis; former executive director, Stephen DiCarmine; and its ex-chief financial officer, Joel Sanders, were accused Thursday of “concocting and overseeing a massive effort to cook the books” at the firm.

“This is not a simple case of aggressive accounting, bad business judgment or poor management,” Manhattan District Attorney Cyrus Vance Jr. said during a press conference Thursday to announce the indictments of the leaders and of Zachary Warren, a client relations manager for the firm in 2008 and 2009.