Christian Carey, who plays "The Kid", replaced another actor who had to drop out for scheduling conflicts 3 days before filming began.
The idea of the story is based loosely on a dream had by Kevin Necessary, many, many years ago.
The week before filming Detective McCarthy's scenes, the original actor had to drop out to scheduling conflicts (due to production schedule changes because of weather), and was replaced last minute by Daniel Britt.
The police officer in the film is a real Cincinnati Police Officer.
The gun used during filming was a prop; it broke during the big fight scene, and through the rest of the movie, was held together with tape and pressure in the right places. It was later replaced - after filming had already ended.