 According to Nguza, Mobutu personally threatened to shoot him.Many believe that Nguza's sole crime was having been mentioned in the foreign press (during the first Shaba invasion) as a possible successor to Mobutu.During his interrogation, Nguza was subjected to torture which included the insertion of a metal tube into his penile shaft, through which jets of air were introduced, causing the blood vessels to rupture, and the application of electrical shocks to his testicles.