Al - Zaidi was interrogated by Iraqi and U.S. agents to ascertain whether anyone paid him to throw his shoes at Bush .
Al - Zaidi was tested for alcohol and drugs , and his shoes were confiscated as evidence .
Al - Zaidi was interrogated by Iraqi and U.S. agents to ascertain whether anyone paid Al - Zaidi to throw Al - Zaidi shoes shoes at Bush .
Al - Zaidi was tested for alcohol and drugs , and his shoes were confiscated as evidence .