E.J. Plum
Edgar Jennings Plum is the lawyer who reads Sam's will, but he is not one of the heirs. He is young and inexperienced. Grace and James Hoo's believe that their clues point to him. Two of their clues are purple and fruited. This can be changed to purple fruit with a left over ed. Purple fruit=plum. Add the ed at the beginning, and it says Ed Plum.