He revealed enough about himself for a google search, which turned up a LinkedIn profile. The LinkedIn profile did not seem very plausible to me. With a bit more rooting around I found a Facebook page & LinkedIn profile for the "real" man -- a local celeb in a small US city, with a big digital footprint including lots of photos.
It appears the scammer may have "harvested" photos from public sites. In constructing his phony profiles on 50Plus and LinkedIn, he borrowed some details from the real person. He also chose someone with a common surname, which made it harder to confirm that his profiles were fake.
I've never come across a scammer who went to the bother of creating a corroborating internet presence. Has anyone else encountered this sort of thing?