The film is set in the present time, although the real events that inspired it and the book happened in late 1986.
Andrés Baiz stated that he wrote 8 different cinematographic versions of Mario Mendoza's book and kept writing during filming.
Colombia's Official Submission to the Best Foreign Language Film Category of the 80th Annual Academy Awards (2008).
The name of the killer in the real life and in the book was Campo Elías Delgado, named in the movie as Eliseo.
Martina García's debut.