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.
The FBI famously sent a letter to MLK urging him to kill himself.
Wow the FBI are gamers
Jokes aside, holy shit that’s monstrous
Monstrous yes, but not as monstrous as what they did next.