The summaries of the FBI's interviews with a PRN engineer show that within days of a conference call with Secretary Clinton's lawyers, the engineer deleted archives of Secretary Clinton's emails, despite knowing those records were covered by preservation orders and a subpoena from Congress. The same interview summaries show that days after the conference call, a work ticket was created at PRN relating to the administration of Secretary Clinton's email server. The contents of the ticket were not provided. Forensic analysis of Secretary Clinton's private email servers by the FBI revealed that Secretary Clinton had not turned over all work-related emails, despite her claims to the contrary, meaning some responsive records may have been included in the archives PRN deleted. Due to the PRN engineer's use of a program called BleachBit, however, the FBI was apparently unable to retrieve those archives. BleachBit is designed to "shred the files to prevent recovery."