Athan Theoharis, a pre-eminent historian of the F.B.I. The cause was pneumonia, his daughter Jeanne Theoharis said. The documents showed the extent of the agency’s break-ins and its illegal surveillance of left-wing organizations; its pursuit of allegations that President Dwight D. Eisenhower had extramarital affairs; and the use of the F.B.I. One of Professor Theoharis’s most alarming finds was a surveillance program forged by the F.B.I. used tens of thousands of the organization’s volunteers to report information about other citizens.

Source: New York Times July 10, 2021 22:18 UTC