Other mistake: At the end, when a policeman pulls an arrow out of Franklin's shoulder, there's no sign of pain or blood, on the arrow or on Franklin's clothes.
Other mistake: When Malcolm is found dead with an arrow in his chest, the arrow is pointing down at an angle, which means it came from someone high up, but, later, we find out it came from someone of around the same height and standing on the ground, not high up on a ladder, or on a rooftop, which it should be, to get that angle.
Chosen answer: Maybe she thinks she's so old that she'll be back in the mortuary soon, so why go home?
kh1616