He shoplifts a sandwich because HE DOESN'T FEEL LIKE PAYING FOR IT???
He goes to great lengths to disguise himself because he is "on the lam." He knows the cops are looking for him. Yet he steals an effing sandwich??? This is a guy who has no doubt that he can get away with anything, and got tired of the cops not being able to find him.
I doubt that he killed the Berman dame because he didn't think he had anything to fear from anybody. The other murder victims were covered up. The mob connection seems like the most likely reason for that one.