The legal fallout from the tragic plane crash that claimed the lives of former NASCAR star Greg Biffle and six others has taken another turn. “The wife and mother of the pilot & son killed in Greg Biffle’s plane crash sued Biffle’s company and the administrator of his estate. AdSydney Haulenbeek @SKHaulenbeek The wife and mother of the pilot & son killed in Greg Biffle's plane crash sued Biffle's company and the administrator of his estate. #nccourts #NASCARAdTwo months ago, Dennis Dutton’s wife filed a similar wrongful death lawsuit against Greg Biffle, seeking $15 million in damages. With them, he won 19 Cup Series wins, a NASCAR Truck Series championship in 2000, and a NASCAR O'Reilly Series championship in 2002.