Amer el-Azizi, a leading al-Qaeda operative, is thought to re-enter Spain to activate a cell that carries out train bombings in Madrid in 2004 (see 7:37-7:42 a.m., March 11, 2004), as he is seen by witnesses in Madrid after the attacks. [Los Angeles Times, 4/29/2004] A senior Spanish investigator will say in 2004, “There are people who have seen el-Azizi here in Spain after the attacks. It looks like he came back and may have directed the others. If he was here, his background would make it likely that he was the top guy. We have reliable witness accounts that he was here in significant places connected to the plot. The idea of el-Azizi as a leader has become more solid.” [Los Angeles Times, 4/14/2004] His fingerprints are found in a safe house first used by the bombers in 2002. A Spanish investigator will comment, “El-Azizi was the brains, he was the link between the [bombers and the rest of al-Qaeda.” [Irujo, 2005, pp. 218; Vidino, 2006, pp. 320-321] El-Azizi was arrested in Turkey in 2000 with several of the 2004 Madrid bombers, but they were released for an unspecified reason (see October 10, 2000). Spanish intelligence also frustrated his arrest after 9/11 (see Shortly After November 21, 2001).