A former Boeing employee known for raising concerns about the firm's production standards has been found dead in the US.

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.

Mr Barnett had worked for the US plane giant for 32 years, until his retirement in 2017 on health grounds.

From 2010, he worked as a quality manager at the North Charleston plant making the 787 Dreamliner, a state-of-the-art airliner used mainly on long-haul routes.

In 2019, Mr Barnett told the BBC that under-pressure workers had been deliberately fitting sub-standard parts to aircraft on the production line.

He also said he had uncovered serious problems with oxygen systems, which could mean one in four breathing masks would not work in an emergency.

Here’s another item to add to that dense flowchart of the Clintons’ potentially sleazy business dealings. The Washington Post reports that throughout her time as secretary of State, Hillary Clinton “functioned as a powerful ally for Boeing’s business interests at home and abroad,” while the company “invested resources in causes beneficial to Clinton’s public and political image.”