Curveball was a chemical engineer from Baghdad who emigrated to Germany in 1998 and began working by early 2000 with Germany 's Federal Intelligence Service , known as the B.N.D . The Pentagon 's Defense Intelligence Agency , which handled Iraqi refugees in Iraq , oversaw the case for American intelligence , and funneled nearly 100 reports to other agencies between January 2000 and September 2001 that were based on information provided by Curveball .