He died of a heart attack at St. Luke 's Hospital in Houston in June 1975 .
Robey sold his record labels to ABC Dunhill Records in 1973 , while remaining as a consultant .
Robey died of a heart attack at St. Luke 's Hospital in Houston in June 1975 .
Robey sold his record labels to ABC Dunhill Records in 1973 , while remaining as a consultant .