If what
@dirtypablo said is accurate, there have been 32 different whistleblowers. It's not like these were the only 2.
Dying of a gunshot, like the first guy, understandably will raise some eyebrows, but a staph infection? They can be dangerous, but usually they don't result in death. MMA fighters get them all the time. And I'm not really sure how you would go about deliberately infecting someone, unless the assassin had a staph infection himself, then had a wrestling match with this guy. Unless they have staph infection bioweapon guns. I dunno.