who killed whom? well Keen solved the cases for himself, but it unclear if he did bring the pieces back to the ladies.. if you assume the two gunshots were from Keen, then you can assume he succeeded, but if you evilly surmise that the rich man or his accomplish had a hidden weapon, then you may assume that Keen met his end here. :P

mysterious.. rich man takes the vixens sight, hearing and voice.. yup very twilight zoney.