In an October 6, 2005 report by Charles A. Duelfer, a CIA adviser who led the arms-hunting Iraq Survey Group, Izmerly is alleged to have been a key figure in training other Iraqi chemists trying to make poison gas for military use in the 1970s, the leader of the effort to produce mustard gas, and in the 1980s was chief of the chemical section of the Iraq Intelligence Service. According to the report, Izmerly's ex-colleagues told interrogators that al-Izmerly was head of human experiments and tested substances for use on assassination targets by giving poisoned food or injections to about 100 political and other prisoners. The report states that Izmerly admitted giving poison to 20 people as part of the experimental program.