John Barnett had worked for Boeing for 32 years, until his retirement in 2017.
In the days before his death, he had been giving evidence in a whistleblower lawsuit against the company.
Boeing said it was saddened to hear of Mr Barnett’s passing. The Charleston County coroner confirmed his death to the BBC on Monday.
It said the 62-year-old had died from a “self-inflicted” wound on 9 March and police were investigating.
My comment was meant to be tongue in cheek but you pretty much nailed the message I’m after. Don’t jump to the conspiracy conclusion but you have to have something wrong with your brain if this doesn’t at least tickle your skeptic gland.