'Mythbusters' Star Jessi Combs' Official Cause Of Death Confirmed

Jessi Combs, who set out to beat a land speed record, was killed due to a “mechanical failure” in her jet car, the Harney County Sheriff's Office has confirmed. This news comes two months after the 39-year-old “Mythbusters” star and professional racer died from her injuries in Oregon on Aug. 27.

It was determined that the mechanical failure had to do with the front wheel possibly hitting something in the desert, such as a rock. "The front-wheel failure led to the front wheel assembly collapsing. The front-wheel failure occurred at speeds approaching 550 miles per hour," Lieutenant Brian Needham said in a press release.

Initially, it was unknown how Combs had died since the car was immediately engulfed in flames following the accident. Her official cause of death has been listed as “blunt force trauma,” according to Yahoo News.

Combs, known as the “fastest woman on four wheels," had been trying to beat the land-speed record in Oregon.

In August, Combs’s boyfriend, Terry Madden, posted a heartfelt goodbye to his loved one on Instagram, calling the accident “horrific” and that they “did everything humanly possible to save her.” He also urged people to be careful with rumors and to rely on the family and officials for updates.

Combs, Madden, and a film crew were also in the process of developing a documentary called "Interviewing Monsters and Bigfoot," starring Combs. Madden, in his Instagram post, promised they’d finish the movie. "...she dedicated her life to helping support others dreams and I promise I will continue that," he wrote.

In an interview with Fox News, director Thomas Smugala said they were dedicating the finished film to Combs.