Which heir is actually Sam Westing?

The game: a tricky, divise Westing game. No matter how much fear and suspicion he instilled in there players, Sam Westing knew that greed would keep them playing the game. Until the"murderer" was captured. And punished.

Sam Westing was not murdered, but one of his heirs was guilty- guilty of some offense against a relentless man. And that heir was in danger. From his grave Westing would stslk his enemy, and through his heirs he would wreak his revenge.