Federal investigators sifting through the wreckage of a business jet that crashed in North Carolina and killed retired NASCAR driver Greg Biffle , his family, and three others are trying to figure out...

Former race driver Greg Biffle and members of his family were among seven people who died in a plane crash Thursday in North Carolina, state police said.

Picked by NASCAR as one of its top 75 drivers in history, Biffle was a Hall of Fame nominee for the stock car series and he drove for 18 years at the top of the sport.