Mohamed el-Atriss, who supplied some of the hijackers with fake IDs (see (July-August 2001)), is visited by FBI agents and begins to help them with their inquiries. [Washington Post, 2/5/2003; Newark Star-Ledger, 10/20/2003] El-Atriss turns over his files to the FBI and, according to his lawyer, promises to “keep his eyes and ears open” for other Islamic militants. He tells the FBI he did not know the hijackers’ intentions when he sold them the ID cards. [Bergen Record, 9/11/2006] He is interviewed extensively by federal authorities over the next few months and successfully passes a lie detector test confirming he did not know they intended to hijack a plane. [Newark Star-Ledger, 10/20/2003] However, authorities plant an electronic surveillance device inside a printer he orders, to monitor who he is making documents for. [Bergen Record, 9/11/2006] El-Atriss’ usefulness suffers a setback when a local sheriff raids his business and arrests him in 2002 (see July 31, 2002), apparently without the FBI’s approval (see July 31, 2002 and After).