Disheartened by the films low box office opening, Paul Walker returned home from dinner, only to discover that Quentin Tarantino had left a message on his machine, praising the film and Walker's performance. Walker was relieved, and happy, that someone like Tarantino had enjoyed the film.
Most of the bloody gunshot wounds were done with squibs, with a handful of CGI one also added. In the commentary, Wayne Kramer mentions that Bruce Altman was terrified of the squibs because he's never been strapped to them before.
Paul Walker's brother also appears in the film. In an early scene the path of a bullet is re-traced going from one house to another - the Paul Walker character appears in each house. The Paul Walker character sitting at the dinner table in one house is actually Paul Walker's brother.
When Oleg says he listens to "Kvasha", this is a direct reference to not only the music type, but also Oleg Kvasha who first played for the NHL team Florida Panthers back in 1996. The first name "Oleg" also happens to be Cameron Bright's character's first-name: Oleg Yugorsky.
The last name on the prescription bottle Oleg gets the child predator's address from is 'Hansel'. In the cautionary Brothers Grimm fable: 'Hansel & Gretel', the children also barely escape the villain by outwitting them.
One of the main characters' name (Joey Gazelle) played by actor Paul Walker could be derived from a character in the graphic novel 'Stray Bullets' where Joey (Gazelle) is a little kid in a criminal domestic environment.
This is the second film starring Cameron Bright to feature a clip of John Wayne getting shot. In Running Scared, the clip is from The Cowboys (1972). In Thank You For Smoking (2005), the clip is from Sands of Iwo Jima (1949).