Jennifer Brady - And Then There Were None

An elderly woman, Jennifer Brady was smothered to death by her butler, Thomas Rogers, after she bequeathed to both him and his wife, Ethel, a small inheritance in her will. 

Her death was ruled an accident. 

Years later, Brady was posthumously avenged when Lawrence Wargrave, under the alias U.N. Owen, lured the Rogers to Soldier Island, where Thomas was tormented and killed by the former judge.