Robert Mueller’s top prosecutor also known as his “pit bull” reportedly tried to offer a Russian oligarch a deal in exchange for information on President Trump.

According to The Daily Caller:

Andrew Weissmann, who served as one of Robert Mueller’s top deputies on the Russia probe, offered a Ukrainian oligarch a sweetheart deal in 2017 in exchange for information on President Donald Trump, according to a new report.

In July 2017, Weissmann, who has been labeled Mueller’s “pit bull” because of his aggressive prosecutorial style, met with attorneys representing Dmitry Firtash, an energy magnate who was indicted on bribery charges in 2014, reports The Hill.

One of the defense memos said that Weissmann claimed he could “resolve the Firtash case” by withdrawing charges against the oligarch, who has since been ordered extradited to the U.S. from Austria.

“The complete dropping of the proceedings … was doubtless on the table,” a Firtash defense memo reportedly says.

Weismann was reportedly looking for dirt on Jared Kushner and links between Trump’s organization and Felix Slater who reportedly was working with Michael Cohen to bring a Trump Tower to Moscow.