The Australian Foreign Editor Greg Sheridan offers the most believable background on this development. Greg has contacts in the militaries of both AUS and US. You have to read the whole thing to get the picture.
(…) This week, The Australian spoke to several senior officials and former officials of different nationalities who have served in Pakistan. All regard it as inconceivable that bin Laden could have been there, unknown to the Pakistanis. As one senior former Indian official said: “It is impossible to live for one day in any cantonment area of a Pakistani military city without the knowledge of the military itself, much less for years at a time.”
In the analytical community, everyone now privately accepts that bin Laden must have had the support of senior figures in Pakistan’s Inter Services Intelligence and among other Pakistani intelligence agencies.
The Pakistani military chief, General Ashfaq Kayani, was head of the ISI for three years. It is inconceivable that, in such a sensitive matter, anything was done without his knowledge.
So, it’s accepted that the Pakistanis are telling lies. (…)