I feel he was airlifted during "operation the great escape" in Kunduz...when Pakistan army requested American/Nato forces not to target their planes. 1000s of ISI officers,Taliban,Alqueda were transported back to Pakistan.
Just as a note...Afghan Intelligence have been saying for the last 4 years, Bin laden is hiding in Pakistan, and it all became true. Politicians such as Nawaz Sharif were close aids of Bin Laden, even according to former ISI head Khalid Khawaja, he was present at the meeting where Nawaz Sharif was given a few million in cash to never distrubed Bin Ladens activities, with Bin Laden present at the time.
In the end, one of bin Laden's couriers was to provide the breakthrough which led to the raid on the compound in Abbottabad earlier this year. Intelligence officials talk about the use of harsh interrogation techniques (or torture in some people's eyes) which may have played a part.
Iam sure the harsh punishment consisted of force feeding him some expired Walls Saugages.
On a serious note...without interrogation its illogical to assume vital intelligence would be gathered. I remmeber in training being told...that Russian special forces are taught how to faint, when caught by enemy forces but nothing worse than being a sniper and caught.
In Pakistan, the Pakistani ISI would interrogate people by inserting a long police baton, laced with red hot chillies.
Pakistan-US: For the record. Prime Minister Gilani said he has received US assurances there will be no repeat of the unilateral raid that killed Usama Bin Laden in May. Gilani's remarks, in an interview with the Guardian, contradict assertions by the US president, Barack Obama, and other American officials that US forces would take similar action against other al-Qaida leaders if necessary, according to the Guardian.