Federal investigators say their probe is going nowhere after footage that would have shown repair work being made on a door plug of the Alaska Airlines 737 Max 9 jet that experienced a midair blowout in early January is now missing. Via WRTV.com:

In a letter from the National Transportation Safety Board addressed to the Senate Committee on Commerce, Science, and Transportation, federal inspectors say they "still do not know who performed the work to open, reinstall, and close the door plug on the accident aircraft."

The NTSB has not been able to interview the door crew manager who would have overseen the repairs in Renton, Washington because he has been out on medical leave. The agency said they are only seeking to interview workers who did the repairs to learn more about Boeing's safety and quality assurance methods.

The letter said, "NTSB investigators first requested documents that would have contained this information from Boeing on January 9, 2024. Shortly thereafter, we identified the door crew manager and were advised that he was out on medical leave. We requested status updates on February 15, 2024, and February 22, 2024, after which we were advised by his attorney that he would not be able to provide a statement or interview to NTSB due to medical issues."

The Department of Justice has launched a criminal probe to examine the door blowout incident, according to multiple reports.

Meanwhile, via Scripps News:

The family of the Boeing whistleblower who was found dead is blaming the company for his death.

Sixty-two-year-old John Barnett of Louisiana died on March 9 of an apparent self-inflicted gunshot wound, the Charleston County Coroner's Office told Scripps News. But his family says a "hostile work environment" is to blame for his death, according to The Daily Beast.

"He was deeply concerned about the safety of the aircraft and flying public, and had identified some serious defects that he felt were not adequately addressed," Barnett's family said in a statement to The Daily Beast. "He said that Boeing had a culture of concealment and was putting profits over safety."

Barnett, a former Boeing employee of 32 years, had been in South Carolina testifying against the aircraft giant when he was found dead in his truck.