A vile email sent to retired NASCAR driver Greg Biffle after he and his family were killed in a plane crash is now raising chilling new questions as authorities investigate what they believe may have been a coordinated inside job targeting the racing icon, Wonderwall.com can report. The 55-year-old, wife Cristina Biffle, their children, Emma and Ryder, and three other people perished on December 18, 2025, when Greg's Cessna C550 crashed in North Carolina. An email sent to Greg's account hours after the crash read, "I heard you're dead, rest in hell.