Nieuwe interviews en de meest recente analyse van bewijsmateriaal werpen nieuw licht op de moorden in 1992 op drie meisjes in Spanje en hun grote impact op het land.
| Sound | Federico Jusid | Original Music Composer |
| Sound | Adrián Foulkes | Original Music Composer |
| Editing | Javier Lafaille | Editor |
| Editing | Pedro Collantes | Editor |
| Editing | Miguel A. Trudu | Editor |
| Production | Ramón Campos | Executive Producer |
| Production | Teresa Fernández-Valdés | Executive Producer |
| Production | Sara Gonzalo | Co-Executive Producer |
| Crew | Giuseppe Truppi | Cinematography |