This can't really be Scott Hubbard from Michigan, right? This is a troll stealing his handle, right?
If not, you really aren't as smart as I thought you were Scott. This is elementary, so I will explain it to you as simplistic as possible.
You bring a picture of the guy walking across the line with a jacket on and no number exposed. You explain that he's a the back of the back of the back of the pack.
You then lay a picture in front of him at the finish line and ask him how he got there without 1, not 1 person seeing him pass them. You then ask him why his clothes and hat are different. You do this over halfway through the interview/recording to keep him comfortable with easy questions.
You show a picture of him in Michigan at the Solstice 10k (soon to be Kona) and ask how he is again in the background after the main pack is long gone, for a 10k mind you, and somehow ends up near the front and his shirt is bone dry on a hot and humid day. His answer on videotape would be?
Thank you as I could interview him myself and do a much better job than the writer and I would get an admission of guilt or he would walk away when faced with irrefutable evidence and the camera would record that as well.
How do you force someone to tell the truth? Well you can't but their actions tell the story and if it were on videotape it wouldn't take a genius to figure it out.
The scenario that I laid out above is something that he can't answer. When you go to a 10k do you where all sorts of different running apparel and then somehow discard it, on a hot day mind you, and end up in front of hundreds of people, people who never saw you pass them, not one?
The writer got the story out to a small percentage of people and that's fine. But, without the pictures and him being confronted, well......it leaves something to be desired.