FILE - DECEMBER 18, 2025: It was reported that Retired NASCAR driver Greg Biffle, his wife Cristina Grossu Biffle and their two children were among six people killed in a plane crash in North Carolina on December 18, 2025. CONCORD, NORTH CAROLINA - OCTOBER 13: Honorary Starter, former NASCAR Cup Series driver, Greg Biffle poses with the green flag in the flagstand prior to the NASCAR Cup Series Bank of America ROVAL 400 at Charlotte Motor Speedway on October 13, 2024 in Concord, North Carolina. (Photo by Meg Oliphant/Getty Images)