In the beginning of the movie, a garbage-truck can be seen entering the prison. On the back it says "Troy - Disposal services". The logo next to this is the head of a horse. This is a reference to the ancient Greek myth of the battle of Troy in which a big wooden horse plays a vital role. The lettering on the truck foreshadows events that await in the movie.
Part of the movie was filmed in a youth facility in Vancouver, British Columbia but production was kicked out as Man of Steel (2013) had come in to shoot there. They moved production to a shut down asylum.