James M —, author of novels Serenade and Mildred Pierce (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
cain
(Other definitions for cain that I've seen before include "Adam's son" , "First murderer reported in the Bible" , "Slayer of Abel" , "Brother of Abel" , "The first known murderer" .)