Emad Salem was used as an intelligence asset during the entire investigation (codenamed TERRSTOP) into the plot and for one year earlier. He had experienced a man being tortured when he was young and so Salem wanted revenge on radical Islam. FBI agents first used him to find the illegal selling of weapons and green cards from Russians and then Salem agreed to help the FBI during the plot. He was recruited to get information of the terrorists the details of the plan. Salem agreed to spy for the FBI if his identity was never revealed. The FBI insisted that he should wear a recording device so that he could testify in later trials, but he did not agree to that. The FBI then used him only as an "intelligence asset." Around May 7, 1993, Salem started meeting regularly with the defendants.