This article hypothesizes that the stories of de Seis problemas para Don Isidro Parodi (1942) reused and reversed the ways of writing the "prison-fiction" stories, typical of the press, to write "fiction-prison" stories, while as soon as they experimented with the Detective Fiction, taking up the discursive modalities of journalism. In the stories gathered in this collection, Borges and Bioy Casares not only took up the imaginary of the prison as a repository of crime, but also replicated scriptural modalities to articulate them with the particularities of the classic Detective Story. It is not a mere copy of the prison notes, but some of its procedures were reused, privileging the difference. This allows us to think of the press as a media with which Detective Literature was inextricably linked and where procedures implemented in crime stories were developed.