There were 27 people packed into the house in Abbottabad when US Navy SEALs arrived on the night of May 2, 2011. But until a few months before that, when bin Laden's oldest surviving wife, Khairiah Sabar, joined them, they had all got on well, Qadir found.
"When Khairiah came, everybody else was very suspicious of her. They didn't trust her at all," Qadir said.
"Everything begins to happen with her arrival. Until then, the Americans seem to know nothing."
It was Khairiah who sold out bin Laden, Qadir said, although it wasn't clear whom she would have communicated with once inside. His account also is at odds with the story leaked by American officials, which contends that they found the Abbottabad house by following an Al Qaeda courier known as "al-Kuwaiti" to the home some time in the second half of 2010.
Qadir called the courier story "fictitious," but his full report, which has yet to be published, already has come under some criticism for its heavy reliance on Pakistani military sources.
Qadir said that he relied on notes of interrogations by Pakistani intelligence agents of bin Laden's wives, which were made available to him through his military contacts. He also conducted his own research. Qadir is known to be close to Pakistan's current army chief, Gen. Ashfaq Parvez Kayani, who arranged several visits for him to the Abbottabad compound, which was cordoned off by security forces after the US raid.
The compound was suddenly demolished, without explanation, by the Pakistani authorities late last month.