I don’t remember exactly where I got that. It was in early reports.
Here is proof that at least one of them was a released terrorist.
Report: Militant Connected to Libya Consulate Attack Freed From Prison During Arab Spring
http://foxnewsinsider.com/2012/10/02/militants-libya-attack-freed-prison/
There is proof that 20 former ‘terrorists’ were released and I am still looking for it.
Col. Hunt On The Newest Libyan Revelations (huge coverup!)
Everyone was informed of the attack in Benghazi in real time. Sec. State, Pres., the Pentagon, the CIA ... It's automatic, required by law and all logged.