He died of heart disease on April 17 , 1990 .
After becoming ridiculed for the revelations in the book about Martin Luther King 's alleged infidelity , Abernathy eventually became less active in politics and returned to his work as a minister .
Abernathy died of heart disease on April 17 , 1990 .
After becoming ridiculed for the revelations in the book about Martin Luther King 's alleged infidelity , Abernathy eventually became less active in politics and returned to his work as a minister .