Who is Deel Arrowsmith from Stories: All-New Tales and what is their importance?

Deel Arrowsmith returns from France feeling like he is already dead. He had gone to France to do his part in the war, caught up in the adventure of it, and now is returning to his home, wife and son. Deel finds his way back, but life is not what he remembers. His wife and son are distant and seemingly more interested in the young man who helped them while Deel was gone. Deel is a decent man, but when he realizes that his wife is sleeping with Tom and his son is likely Tom's as well, he loses the will to come back. He shoots Tom and his wife dead, and is happy to allow Sheriff Lobo to take his life.