My bad wrote:
Yeah, I overstepped. And apologies again to Ms. Wu if she should ever happen to wade through this thread. I had a theory that the photos might show an accomplice trotting through 10km a few seconds after FM and that runner stood out but it doesn't sound as though there's any connection at all.
Most of the theory still holds though. FM went over the line at 41:08 after stretching for well over a minute and inching his way back onto the course. I don't believe there would have been an easy way for him to navigate either side of the first 10km fast enough to carry his own chip over 5km and be waiting for 1:30? more? at 10km. Someone else is involved.
I don't know that he would need a second runner. However, I agree about an accomplice. The whole scheme gets easier if he coordinates with someone in a car who picks him up and drops him off at predetermined locations. The road closure information is available for anyone who wants to study it: