Retired NASCAR driver Greg Biffle was not flying his own jet when it crashed last month, killing him and six others, according to a Friday report from federal safety officials who also concluded that while an experienced pilot was at the controls,

A crash involving multiple vehicles caused all lanes of southbound Interstate 15 near Balboa Avenue to be blocked Wednesday afternoon.

Dennis and Jack Dutton appeared to be piloting the plane, based on details in the report, though another passenger on the plane was also a pilot.