The police came back because of the chalk marks left in the door when she was getting pulled back inside by the antagonist's wife. Simon noticed the marks from his window and made the call. When the police are coming in again the camera points at the door marks.
I think it was a great thriller, good acting and good story development. The girl had a trauma with a safety zone being defined by the chalk and in the end that helped to solve the whole mystery, in my opinion there were no missing pieces left to connect or plot holes.
Highly recommend it for a weekend, it doesn't happen too often to find this level of quality thrillers in Netflix lately.
I think it was a great thriller, good acting and good story development. The girl had a trauma with a safety zone being defined by the chalk and in the end that helped to solve the whole mystery, in my opinion there were no missing pieces left to connect or plot holes.
Highly recommend it for a weekend, it doesn't happen too often to find this level of quality thrillers in Netflix lately.