It might be interesting to think about reasons a whistleblower assassination could happen. (I found #6 below kinda interesting, because I didn't think of it immediately, but only once I started thinking through possibilities.) Non-exhaustive:
1. Warlord-like show of power, signaling that they're so strong they can openly act with impunity. Such as gratuitously using a military weapon not publicly available and on another country's soil, or a straight-faced coroner's determination of suicide by two self-inflicted gunshots to the back of the head before throwing self through a skyscraper window. (I don't see this in the Boeing situation.)
2. Powerful person lashing out due to mental illness instability/pettiness. Where there's no gain to be had, but their ego or other trigger was stepped upon. In the news in recent years, we've seen at least a couple powerful high-profile personalities who might fit the profile. (I don't see a connection to the Boeing situation.)
3. Prevent the whistleblower from testifying further. (I guess probably the cat's already out of the bag on the Boeing situation.)
4. Warning to other whistleblowers by that same entity, if further testimony could do more harm than has already been done. (Again, I guess probably the cat's out of the bag on Boeing.)
5. Lower-ranking individual's self-interest. Let's say there's no advantage to an organization or higher-up persons in assassinating a whistleblower, but... some lower-ranking person doesn't want to be implicated personally by something this whistleblower knows, or there is some unrelated mini-scandal that could be exposed as the whistleblower is interviewed. In general, I suspect that lower-ranking butt-covering is the source of massive number of problems and misbehavior in organizations, including all sorts of "coverup is worse than the crime" outcomes. (But I'd guess unlikely there's a big enough motivation for any lower-ranking individual connected to the Boeing situation to murder anyone over it.)
6. Uninvolved party sending a message to all high-profile whistleblowers. Let's say you're a powerful person, and evil (or imagining yourself serving some worthy cause through evildoing), and you're sitting on top of what could be a massive scandal, and you're vulnerable to whistleblowers. So, on the occasion of whistleblowers being in the news on some other high-profile scandal -- unrelated to you -- and possibly planting whistleblowing ideas among people who are a threat to you, you take the occasion to shift public sentiment about the desirability of whistleblowing in general. (Farfetched.)
7. Foreign sabotage, sowing social disorder. Make it look to people of the target country like their country is so corrupt that whistleblowers are assassinated openly and with impunity. (Farfetched, especially since we have so much erosion of trust already, I'm not sure we need any more pushes.)
1. Warlord-like show of power, signaling that they're so strong they can openly act with impunity. Such as gratuitously using a military weapon not publicly available and on another country's soil, or a straight-faced coroner's determination of suicide by two self-inflicted gunshots to the back of the head before throwing self through a skyscraper window. (I don't see this in the Boeing situation.)
2. Powerful person lashing out due to mental illness instability/pettiness. Where there's no gain to be had, but their ego or other trigger was stepped upon. In the news in recent years, we've seen at least a couple powerful high-profile personalities who might fit the profile. (I don't see a connection to the Boeing situation.)
3. Prevent the whistleblower from testifying further. (I guess probably the cat's already out of the bag on the Boeing situation.)
4. Warning to other whistleblowers by that same entity, if further testimony could do more harm than has already been done. (Again, I guess probably the cat's out of the bag on Boeing.)
5. Lower-ranking individual's self-interest. Let's say there's no advantage to an organization or higher-up persons in assassinating a whistleblower, but... some lower-ranking person doesn't want to be implicated personally by something this whistleblower knows, or there is some unrelated mini-scandal that could be exposed as the whistleblower is interviewed. In general, I suspect that lower-ranking butt-covering is the source of massive number of problems and misbehavior in organizations, including all sorts of "coverup is worse than the crime" outcomes. (But I'd guess unlikely there's a big enough motivation for any lower-ranking individual connected to the Boeing situation to murder anyone over it.)
6. Uninvolved party sending a message to all high-profile whistleblowers. Let's say you're a powerful person, and evil (or imagining yourself serving some worthy cause through evildoing), and you're sitting on top of what could be a massive scandal, and you're vulnerable to whistleblowers. So, on the occasion of whistleblowers being in the news on some other high-profile scandal -- unrelated to you -- and possibly planting whistleblowing ideas among people who are a threat to you, you take the occasion to shift public sentiment about the desirability of whistleblowing in general. (Farfetched.)
7. Foreign sabotage, sowing social disorder. Make it look to people of the target country like their country is so corrupt that whistleblowers are assassinated openly and with impunity. (Farfetched, especially since we have so much erosion of trust already, I'm not sure we need any more pushes.)