What former U.S. Attorney for the Eastern District of Virginia Jessica Aber, 43, who was discovered dead over the weekend, had been looking into and prosecuting was disclosed in a report released on Monday.

Aber “had been in charge of some of the biggest cases targeting leaks in the CIA and Russian nationals carrying out fraud in America,” according to the New York Post.

According to some sources, authorities are looking into Aber’s cause of death. Just before 9:20 a.m. on Saturday, Alexandria police discovered her unconscious at her residence.