The Pentagon whistleblower who claims the US has run a top secret UFO retrieval program for decades says some of the 'non-human intelligences' discovered are malevolent and have even killed humans. 

David Grusch served 14 years in the Air Force, where he says he was told about the program by others who were involved. 

Grusch, 36, is a decorated Afghanistan combat officer who went on to work for the National Geospatial-Intelligence Agency (NGA) and the National Reconnaissance Office (NRO). 

His role was to act as the NRO's representative when dealing with the Unidentified Aerial Phenomena Task Force. The task force was specifically set up to investigate UFOs. 

Over the last week, he has gone public with what he says it entailed, telling NewsNation about how the US is in an arms race with Russia and China to understand the extra-terrestrial life. 

In his most recent comments, he says the 'non human' intelligences have acted with malevolence - and even killed some humans. 

'I think the logical fallacy there is because they’re advanced, they’re kind. We’ll never really understand their full intent and that’s because we’re not them. 

'But I think what appears to be malevolent activity has happened.

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