you're going to hear that saad aljabri may not be spotless. but as a spymaster, saad says he has one more favor for america: a warning about a prince, with the power to trouble the world. >> dr. saad aljabri: i am here to sound the alarm about a psychopath, killer, in the middle east, with infinite resources, who poses threat to his people, to the americans, and to the planet. >> pelley: saad aljabri is talking about mohammed bin salman, who seized power behind the back of the man greeting president obama. that's mohammed bin nayef, then heir to the throne. but in 2017, nayef was arrested by prince mohammed bin salman. a psychopath? >> saad aljabri: a psychopath with no empathy. doesn't feel emotion, never learned from his experience. and we have witnessed atrocities and crimes committed by this killer. >> pelley: a source from u.s. intelligence told us, saad aljabri would never show up for this interview. he'd lived too long in a silent profession. the fact that he did show up is a measure of his desperation. saad is 62, married, eight childre

here's saad aljabri talking about that warning.e that mr aljabri has spoken publicly about his split with the crown prince. in the programme, the former acting cia director mike morrell spoke about how dr aljrabi had saved the lives of many americans. intelligence from mr aljabri had led to the interception of bombs that had been planted by al-qaeda in 2010 on two planes intended for america. he said there were other examples, but they were still classified, and described mr aljabri as "honourable". he hasn't spoken about his break from the kingdom before. here's our security correspondent frank gardner on why saad aljabri is speaking out now. saad aljabri, this former intelligence official, is living in exile in canada, and two of his children have been seized by the authorities in saudi arabia, accused of financial crimes which they totally deny. they were 17 and 18 when they were taken, and they're currently in prison. and his message is, "look," to the us government, "i helped save you from terrorist acts." he, for example, gav