I had a major bug that prevented me from completing the story. Game seems to be stuck on a loop after you exit Maria's parents' house; it doesn't recognize the receipt you picked up, and so you can't have the new conversation with Elsa. The Officer is the only one you can speak to, and you can't go back.

Which is quite a shame, really, because the story is really quite good and I didn't expect the plot twist at all (had to watch the playthrough on YouTube).