Paradisi's partner gasps while dying, but she was supposedly strangled and strangled victim is already dead when the grasp is released, so the whole scene doesn't have much sense.
Stefania's teacher says, given an assignment to draw a house she'd want to live in, she drew the picture of the garbage man's house, but, as she was never allowed to leave the estate where she lived, and only went out of the house accompanied by an adult, no reason is provided as to why she would be near the quarry to have seen his house before she saw it a week later, from where she was imprisoned, in the house across the way.