US officials say he was the person who decided who could see or speak to the former Iraqi president and who couldn't, which meant he was always at his side.
Might know where Saddam is
It's an important development because he might know where Saddam actually is.
And he's believed to know something about suspected weapons sites.
He's thought to have been only a bit less powerful than the president and his younger son, Qusay.
Abid is the 32nd person on the list known to have surrendered or been captured.