A former Iraqi intelligence officer testified Wednesday that he recognized Iraqi documents bearing the name of a US man accused of working as an informant for Saddam Hussein. The witness, who was referred to only as "Mr. Sargon" to protect his identity, said he recognized documents belonging to the Iraqi Intelligence Service that were signed by defendant William Shaoul Benjamin. Benjamin, 67, an Iraqi-born US citizen who lives in Los Angeles, is charged with conspiracy, failing to register as an agent of a foreign government and making false statements. If convicted, he faces up to 20 years in prison. Prosecutors say he was a paid informant for the Iraqi Intelligence Service before coming to the United States in 1992, and later collected intelligence on Assyrian Christians in the US without telling the American government.