The former intelligence officer who claims the US government has recovered multiple UFOs of 'non-human origin' has also claimed that dead pilots have been retrieved from wreckages.

David Charles Grusch, an Air Force veteran and former member of the National Geospatial Intelligence Agency, said the US and other nations are engaged in a top-secret arms race to 'reverse-engineer' alien technology. 

He made the extraordinary claims in media interviews this week, after filing a whistleblower complaint providing what he calls classified 'proof' to Congress and the Intelligence Community Inspector General.

Grusch, 36, said that in addition to recovering partial and intact extraterrestrial craft for decades, the US government has also retrieved the remains of alien pilots.

'Naturally, when you recover something that's either landed or crashed. Sometimes you encounter dead pilots and believe it or not, as fantastical as that sounds, it's true,' he told NewsNation. 

Grusch is a former member of the Pentagon's Unidentified Aerial Phenomena (UAP) Task Force, which was tasked with investigating UFOs and has since reorganized into the All-Domain Anomaly Resolution Office (AARO), to include investigations of objects operating underwater.

Citing witness statements from numerous current and former intelligence officers, Grusch claims that key information about recovered non-human craft was withheld from the UAP Task Force during his tenure. 

'I thought it was totally nuts and I thought at first I was being deceived, it was a ruse,' Grusch told NewsNation.