NEW : A ##roner says the cars ` ` are not designed to bang wheels '' as of Sunday . NEW : A says Wheldon died of ` ` blunt force trauma , '' deems death an ` ` accident '' The 2-time Indianapolis 500 winner was driving a safer IndyCar in the weeks before his death . Fellow driver Dario Franchitti says the Las Vegas speedway is ` ` not a suitable track ''
NEW : A driver says the cars `` are not designed to bang wheels '' as happened Sunday . NEW : Coroner says Wheldon died of `` blunt head trauma , '' deems death an `` accident '' The 2-time Indy 500 winner was testing a safer IndyCar in the weeks before his death . Fellow driver Dario Franchitti says the Las Vegas speedway is `` not a suitable track ''