But once he started 'singing' about the underground fighters, the US got even more information on anti-US resistance elements in Iraq and detained them, too. Saddam is such an arrogant dunce, he probably thinks he can outsmart the interrogators. All they want is for him to keep talking, and trying to outsmart them. Then, when he lets slip something that matches other intel, they bag somebody else.
Yep. That's how the do it. And you can be sure he is probably in the middle of his evening interrogation session over in/at ________ right about now.