God, what a stupid movie (spoilers)
So she's upstairs, the priest says there's so much blood, she probably killed someone...and suddenly nobody's interested in finding who she killed. So there's a body upstairs, and he brings the demon a ham sandwich, cause the demon might be hungry. How much time elapses between when they notice all the blood and when the demon gets around to pointing out that mom's in the closet?
God, what a stupid movie. Want exorcisms? Reply 'The Exorcist.' At least that makes freaking sense.