sentences:  NPR and the "Wall Street Journal" reported that the raids were in relation to an investigation into allegations of obstruction of justice by Bloch's office.The "New York Times" reported that the investigation concerned whether Bloch had hired an outside company to "scrub" computer files to prevent an inquiry into whether he had violated the Hatch Act by mixing politics with his job, which is to shield whistleblowers.As part of an investigation into destruction of evidence, Bloch's person was searched and two portable memory devices were recovered.