Hypothetically, if you are a witness or whistleblower who's adversary was a very big corporation (such as boeing), what measures could you take to prevent yourself from being "suicided"?
They just have to say: "I give you 1.000.000 bucks if you give this food to that person, it will look like a bad flu and you'll get the money". If one rejects the offer there's 7 more to do so.