Question: I don't really understand why Jodie Foster's character didn't tell the police something was wrong when they came to the door. I know she was worried for her daughter but the robbers couldn't overhear and she could have asked the police to come back later, giving her a chance to smash the cameras. Also, considering that she emphatically denied there was anything wrong, why did the police return later with all the guns etc?
Question: How did the robbers know of the money? There was no mention of inheritance from the main crook.
Question: Why did the robbers stick around after smashing the phone lines in the basement? Were they not at all concerned that Meg had enough time to call the police in that time?