Curveball says an accident at Djerf al Nadaf kills 12 bio-warfare technicians. The CIA later says Curveball witnessed the accident and was injured, but Germans say he only heard "rumors" of incident.
Move to Germany
Curveball applies for political asylum in Germany. He tells German intelligence for first time that he built germ weapons trucks. U.S. investigators later conclude he conjured up story to obtain visa.
German intelligence officers first interrogate Curveball. They refuse to let U.S. operatives meet him. But summaries of his information are quickly provided to senior U.S. policymakers.
Doubts emerge about Curveball. A CIA doctor, posing as a German, meets the defector and reports he spoke "excellent English." German officials say Curveball has emotional problems.
9/11 raises profile
The Germans complete interrogations of Curveball. 9/11 terror attacks raise U.S. concerns about Saddam Hussein. CIA reassesses Curveball reports and sharply increases warnings of Iraq's germ weapons.
A CIA warning
A German intelligence official tells Tyler Drumheller that Curveball may be a fabricator. Drumheller tries to warn others at the CIA. But U.S. intelligence concludes that Iraq has greater bio-warfare capabilities.
Colin Powell warns U.N. that the mobile labs Curveball described can kill thousands of people. U.N. inspectors visit Djerf al Nadaf and other sites in Iraq but find no evidence. U.S. invades Iraq.
Bush affirms WMD
U.S. find two trucks with lab equipment. Curveball identifies some items. President Bush announces finding weapons of mass destruction. CIA determines the vehicles cannot be used for biological weapons.
CIA-led investigators discover Curveball was fired in 1995, and could not have worked on bio-weapons. Friends call him a liar and a fraud. "Jerry," a CIA official, tries to convince senior officials of their mistake.
CIA closes case
Germans allow the U.S. to interview Curveball. He refuses to admit deceit, but CIA case officer is convinced he is lying. CIA declares Curveball a fabricator and withdraws all reports based on his accounts.