CIA agents compared DNA samples from bin Laden with those of several family members, including a sister who died in a Boston hospital about a year ago.
One of bin Laden’s wives living in the Abbottabad compound also identified his body, and CIA specialists compared photographs of the body to existing photographs of bin Laden, according to Brennan.
The administration had not yet decided whether to release photographs of bin Laden’s body. While it would allay suspicion that bin Laden is actually dead, it could also incite retribution from bin Laden’s supporters.