Roger K. Leir, D.P.M., (1934 – March 14, 2014) was a podiatric surgeon and ufologist best known as an investigator of alien implants. Leir appeared frequently on television and talk radio programs devoted to ufology.
Leir said he had removed about a dozen implants from people's bodies and claimed they were devices that "emit radio signals." Leir alleged that implants had moved by themselves during surgery as if to avoid removal. Leir said that laboratory testing of the implants implied they were of extraterrestrial origin.
Skeptical investigator Joe "Wooden" Nickell said that the alleged implants appeared to be ordinary objects such as shards of glass or fragments of metal that become lodged in arms, hands, legs and feet due to accidental falls or barefoot walking. Nickell said that Leir's associate, Derrel Sims, supposedly refused to cooperate when asked to provide a forensic medical institute with specimens or photos for analysis.
A feature film in in production titled, Patient Seventeen, which explores Doctor Roger Leir's claims to remove highly advance implants, nanotechnology microchips imbedded by aliens, non-humans monitoring our earth. Discover his world of abductions, scalar wave transmissions, and a program to study or manipulate the human race. Director and investigative filmmaker Jeremy Kenyon Lockyer Corbell, will be hosting a private pre-premiere of the work at the 2015 International UFO Congress Film Festival in Arizona, February 2015. 
- "Roger Leir". imdb.com. Retrieved 29 March 2013.
- "Dr. Roger Leir". Coast to Coast AM. Retrieved August 17, 2012.
- Joe Nickell (24 October 2001). Real-Life X-Files: Investigating the Paranormal. University Press of Kentucky. pp. 124–. ISBN 978-0-8131-3727-8. Retrieved 29 March 2013.
- R. Stephen White (1 June 1998). Why science?. Nova Science. ISBN 978-1-56072-748-4. Retrieved 30 March 2013.
- Emmis Communications (May 1998). Orange Coast Magazine. Emmis Communications. pp. 14–. ISSN 0279-0483. Retrieved 30 March 2013.
- Colbern, Steve (2011). "Analysis Report on Sample RN-1-2010". Retrieved 7 December 2014.
- "R.I.P. Dr. Roger Leir". Coast to Coast AM. 2014-03-16. Retrieved 2014-03-16.
- "Dr. Roger Leir Has Died!". 2014-03-15. Retrieved 2014-03-16.
- "Dr. Roger Leir Dies". Unknown Country. 2014-03-16. Retrieved 2014-03-17.
- "PATIENT SEVENTEEN - Small incision, Big mystery". IMDB.com. Retrieved 2015-01-16.
- www.alienscalpel.com — Biographic information on Dr. Roger Leir
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