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.
That assumes there will always be a good alternative to choose from.
From where I live to go back home to my parents there is exactly one provider that flies directly. All other connections have stop-overs. Not even talking about price difference.
I get wanting to save your time, but if you die there’s no time left to save