Boeing whistleblower John “Mitch” Barnett took his own life on March 9, South Carolina authorities reiterated in two reports released Friday. All findings suggest he died from a single, self-inflicted gunshot wound.

Barnett, 62, was found dead in his truck in Charleston, S.C. He was in the midst of giving depositions alleging Boeing retaliated against him for complaints about quality lapses, and was scheduled to continue depositions the day his body was found.

As he was a Boeing whistleblower caught up in a long legal fight with his embattled former employer, Barnett’s death received global attention. That attention intensified this month when a second whistleblower, Joshua Dean of Boeing supplier Spirit AeroSystems, died from an infection.

Immediately after his death, Barnett’s attorneys, Robert Turkewitz and Brian Knowles, called for an investigation into his death and said at the time there was no indication he would take his own life.

Frontier Airlines breaks away from ultra low cost ticket model

Frontier Airlines, famous for deeply discounted ticket prices and bare-bones service, is adding new fare categories that include carry-on bags, seat selection and no cancellation fees as it seeks to appeal to U.S. travelers who want more upscale options when they fly.

Frontier, a unit of Frontier Group Holdings Inc., is now offering four fare and service categories — basic, economy, premium and business — with varying benefits, the carrier said in a statement Friday. It’s also dropping change and cancellation fees for all but its lowest level of basic fares.

Fares for the economy option will start at $30 more than the basic category, with premium at least $50 more and business starting at $100 more, Frontier said.