Dating back to the Spanish Inquisition, the suffocation of bound prisoners with water has been favored because, unlike most other torture techniques, it produces no marks on the body.[27] CIA officers who have subjected themselves to the technique have lasted an average of 14 seconds before capitulating.[3]
According to at least one former CIA official, information retrieved from the waterboarding may not be reliable because a person under such duress may admit to anything, as harsh interrogation techniques lead to false confessions. "The person believes they are being killed, and as such, it really amounts to a mock execution, which is illegal under international law," says John Sifton of Human Rights Watch.[3] It is "bad interrogation. I mean you can get anyone to confess to anything if the torture's bad enough," said former CIA officer Bob Baer.[3]