Corrected entry: When the sheriff reveals himself to Miranda, how could there not be ANYBODY in the police station? Not one cop, not one employee, yet he still has procedures to follow and so he could not just dismiss everybody.
Corrected entry: How on Earth did Robert Downey Jr work out who the killer was just by looking at a tattoo website? Nobody even knew the sheriff had that tattoo.
Correction: Halle described the type of tattoo the killer had on his chest. Since the website was of people who had the type of tattoos the killer had, RD Jr. most likely saw a picture of the sheriff on the website and recognized him.
Corrected entry: Halle Berry and her husband have been working at the hospital for several years - why does she not know that the doctor's daughter died?
Correction: It was never established how long either Miranda or her husband have worked in the hospital. Or how long the other doctor had been there. Perhaps he just started and did not divulge his personal life with Miranda or her husband?
Corrected entry: In the scene when the prisoners were taking a shower, no one had a bar of soap.
Correction: Nowadays there are soap pumps attached to the showers (in prisons and institutions) so there is no need for a bar of soap. I guess the "don't drop the soap" jokes are over.
Corrected entry: How did Miranda "get off" from the murder of her husband? Legally she still did it, even though she was possessed by Rachael.
Correction: She didn't exactly "get off". Although they didn't show it, you can gather from the last scene, she was either declared not guilty by reason of insanity or declared guilty of a lesser crime sentenced to the mental facility. In either case, she spent some time before the last scene locked up. You'd never convince a jury that she was possessed, but you could certainly convince them that she snapped when she found out her husband was a sadistic molester.
Corrected entry: If Chloe had really been raped in her cell by the sheriff repeatedly, don't you think they'd have it on camera? Even though they suffered from power outages, you'd think he'd be on camera at least once. Also it's quite hard to believe that a local sheriff would be allowed to visit women's cells late at night without even being asked what he's doing there.
Correction: It was not the spirit of Rachel. It was the sheriff. Miranda saw the tattoo on his chest. The movie is about Doug and the sheriff torturing and murdering women and getting away with it because of who they are. The original entry is correct.
Correction: The sheriff did make arrangements of some kind: he could dismiss many, send some home "sick," dispatch some on long patrols and false calls, etc.