Michael Cohen reportedly sat with government investigators for more than 50 hours, despite no formal agreement to cooperate with authorities as he awaits sentencing by a New York federal court.

Cohen gave prosecutors vital information pertinent to a series of undisclosed investigations over the course of his interviews, Vanity Fair reports.

Cohen, who had been President Trump's personal attorney, pleaded guilty in August before a federal court in Manhattan to a range of tax and bank fraud charges, as well as campaign finance violations for nondisclosure arrangements he made before the 2016 presidential election with women claiming to have had extramarital affairs with Trump. He is yet to be sentenced.

The charges emanated from a probe led by the U.S. Attorney's Office in the Southern District of New York after it received a referral from special counsel Robert Mueller's team.

Cohen's lawyer, Lanny Davis, declined to comment to the Washington Examiner, but tweeted Tuesday that his client "doesn't fear the truth."

Cohen declared in an ABC News interview in July that his family and the country had his "first loyalty" as opposed to Trump.