You would have thought, if he didn't answer the door, they'd have called him on his mobile or landline ...
But - this was not a news story four years ago. It's only a news story now because of the story on Salazar. And the Salazar story did not involve Farah. So this is mainly a bit of s***stirring by the Daily Mail (in which it first appeared). The DM probably views Farah as an illegal immigrant so, as it's the DM, I'm backing Farah until proven otherwise ...