Headscratchers / When Darkness Falls

• Right before Nina gets murdered, we can clearly see that the rest house where the family is supposed to sleep that night sits by a multilane autobahn. But when we later see how the family drives Nina over and over the road, it is suddenly a single-lane country road.
• After Nina's death when the family is already back in Sweden, Leyla's mother tells her that Nina is already buried in "the land she was born" (presumably Iran) and that she was flown there directly from Germany. You can't exactly tell how long Leyla was sedated but it is hard to believe that a body of a person that allegedly committed suicide (that's the official version) would be released for the funeral, flown in another country and be buried there in above one week.
  • It is also strange that the police in Germany didn't seem to have investigated that much in this "suicide".
• How did Leyla's mother get her out of the coffeehouse after sedating her? Somebody would say something if a woman would simply drag her unconscious daughter outside.
• What happened to Leyla's sister Diza? Stella the policewoman tells her at the end that her brothers will be taken care of by the youth welfare service but she says nothing about Diza. Especially when you see how close they are you wonder why she isn't with her adult sister.