[lupusreal]

He may have been killed not because his own testimony was a threat to Boeing, but rather to make other presently unknown potential whistleblowers think twice and decide to never come forward in the first place. Sending an implied threat to Boeing employees.

For instance, any Boeing/Spirit employees who might be thinking about going to the FAA with information about who in management knew about and okayed the plug door "opening" scheme. Boeing surely wants the investigations to conclude that this is something no more than a few workers did of their own initiative and successfully hid from management, but that's probably not true.