Released by Bush in 2004.
Apparently apprehended again afterwards for a period of 4 years.
https://en.wikipedia.org/wiki/Abu_Bakr_al-Baghdadi
A number of newspapers and news channels have instead stated that al-Baghdadi was interned from 2005 to 2009. These reports originate from an interview with the former commander of Camp Bucca, Colonel Kenneth King,[52] and are not substantiated by Department of Defense records.[53][54][55] Al-Baghdadi was imprisoned at Camp Bucca along with other future leaders of ISIL.[56]
I saw that Business Insider claims to have the true and complete story, but I refuse to relinquish my ad blocker in order to read it.