Joe Lynch has stated many times on his podcast "The Movie Crypt", that the reason he wanted to shoot in Serbia was "because he wanted shoot somewhere foreign for a few months, like big time directors always claim to want to do."
Kate Hudson was attached to the project for a long time, but after the movie was stuck in development, she dropped out and Salma Hayek later got the job.
Everly is clearly shot in her side while wearing a white nightie. However, in scenes afterwards, it is noticeable that there is no entrance hole nor an exit hole in the garment. Only blood can be seen where she had been shot.
The Asian man on Everly's couch can't move, however, when her mom comes into the apartment, the blood drip from his mouth has been wiped away, despite Everly never having approached him after reentering the apartment.