Well... my beloved and I are going on the assumption that she killed the one who thought he was her father until he found out Red was (which brought about his mistreatment of her mother). And Lizzy obviously had no clue about the situation at the time.
Possible.
Anyway, I was "certain" Tom's (Jacob's) boat was going to explode from a bomb in that scene where he sped off in it. But I was certainly wrong. LOL
Really good show and great season finale!