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"?
Additionally, give a copy of all the documents to your lawyer to release in the case of your death. Multiple Deadman switches are better than one, especially one that's controlled by a person and not just hoping your cloud service doesn't go down after you're dead.