[YaYa123]

Well, if you try long enough, you can eventually come up with an explanation that won't be laughed off the front pages.

[Rudder]

Since no one has reported seeing this incident, there is absolutely no evidence that he had been pushed off the bridge. Therefore, the only conclusion supported by the evidence is that he fell. Of course this conclusion may not be factually accurate, but it's good enough for government officials. Case closed.