175The authority responsible for an administrative investigation has, as is apparent from the case-law, broad discretion in the conduct of the investigation (see, to that effect and by analogy, judgments of 16 May 2012, Skareby v Commission, F‑42/10, EU:F:2012:64, paragraph 38; of 11 July 2013, Tzirani v Commission, F‑46/11, EU:F:2013:115, paragraph 124; and of 18 September 2014, CV v EESC, F‑54/13, EU:F:2014:216, paragraph 43).