Journalists Hugh Turley and David Martin are not investigative journalists of the stature of Bob Woodward and Carl Bernstein and they did not have the resources or the backing the latter had when they wrote their exposés of political skullduggery and ethical malfeasance. But they do benefit from the pioneering work of Seymour Hersh, whose 1974 disclosure of CIA spying practices on antiwar activists provides some underpinning to their central thesis in The Martyrdom of Thomas Merton.
Higgins, M.W. (2019). The martyrdom of Thomas Merton: An investigation [Review of the book The Martyrdom of Thomas Merton: An Investigation, by H. Turley & D. Martin]. The Merton Annual, 32.