The point still stands. There ought to be some level of statistical analysis to tell you how likely an event this is rather than immediately reaching for the conspiracy theory lever.
In that "statistical analysis" the company and more importantly the time must be factored in.
Yes, I am sure out of all whistleblowers, all over the world, for all types of stories (war crimes, finance (insider trading), etc) there must many that do just die.
But...
1. The same 'set' of whistleblowers (exposing manufacturing faults in Boing aircrafts) 2. In less than two months..!
Not to mention not just at any time but during multiple ongoing investigations...?