Coroner withholds autopsy findings , wo n't even confirm identities of dead . Comment: Co-star Vin Diesel addresses crowd of grieving fans with police loudspeaker . No memorial service plans have been made , Walker 's publicist has said . Sheriff 's office says it is focusing on speed as the cause of Saturday 's fiery crash .
Coroner withholds autopsy findings , wo n't even confirm identities of dead . Comment: Co-star Vin Diesel addresses crowd of grieving fans with police loudspeaker . Sheriff 's office says it is focusing on speed as the cause of Saturday 's fiery crash .