The two-body problem

You’ve heard the story before. The motorist who is traumatised by an accident involving someone who runs out into the road. Afterwards, there is no sign of a body and, after doing a laughably small amount of research, they find that someone had, indeed, been killed in such an accident exactly ten, or twenty, or thirty-seven years earlier. But, in this case, there were some differences. In this case there was a body.