Corrected entry: There was a point in the movie where an elderly Rene Gagnon told Doc's son that he'd seen Ira only once since he'd left the fundraising tour. That's when he passed him on the road and didn't pick him up. About 10 minutes later in the movie, the three were at the Marine Memorial dedication together, which would make it the 2nd time Rene had seen Ira.
Corrected entry: Toward the end of the movie, Doc's son was narrating and said he never knew about any of this until after his father died. Within seconds, he and his father (while on his death bed) are talking about the whole thing while he is obviously very much alive.