After the discovery of Ashley's dead body in the pool the group comes together to figure out what to do next. When Aaron and Tyler are shown you can see light rain in the background. However when Jenna and the others are shown there is no rain at all visible. So as in the following scenes.
If the police didn't know for certain who everyone was, where did they get the head shots of them all?
When they put Ashley's body in the freezer, one of her eyelids move.