أبو مصعب الزرقاوي
According to U.S. and Iraqi officials, Abu Musab al-Zarqawi was responsible for Hakim's assassination. They claim that Abu Omar al-Kurdi, a top Zarqawi bombmaker who was captured in January 2005, confessed to carrying out this bombing. They also cite Zarqawi's praising of the assassination in several audiotapes. Muhammad Yassin Jarrad, the brother-in-law of Abu Musab al-Zarqawi claimed that his father, Yassin, was the suicide bomber in the attack.