Costigan was thought to be in his late 70s or early 80s when he died, ending a career that included the noted TV movie "Love Among the Ruins," The New York Times reported Sunday.
Costigan enjoyed similar success with the 1976 TV film "Eleanor and Franklin," which brought a second Emmy into the writer's growing awards collection.
The writer's association with Emmy Awards began in 1959 when he won for best screenplay for his work on the "Hallmark Hall of Fame" episode, "Little Moon of Alban."
The Cook Family Funeral Home on the Washington island told the Times Costigan, who died Dec. 19, 2007, had no known survivors.
Celebrity Breakups and divorces of 2014 [PHOTOS]