A Study of a Specialised American Police Discourse Genre: Probable Cause Affidavits

This paper focuses on the analysis of a specialised American police discourse genre and is based on a corpus of 115 probable cause affidavits. A probable cause affidavit is a sworn statement written by American police officers to state that there is probable cause to believe the defendant has committed (or is committing) a criminal offence and that legal action is required. After briefly presenting the methodological framework for this study, the paper intends to show how the police use specific linguistic, discursive and rhetorical strategies to serve a specialised purpose, which is to present the existence of probable cause to the relevant legal authorities. The findings indicate that officers use various discursive devices to inform but also—and perhaps more importantly—to convince their audience by means of a chronological and structured narrative of events that follows a prototypical three-fold internal organisation (exposition, investigation, resolution) signalled by specific linguistic markers. Finally, the paper intends to go beyond the objective description of events in order to highlight the assertive nature of this discourse genre and the additional rhetorical strategies used by PCA writers. It studies the emphasis placed on the expertise of the author, as well as the police classification of the offence and the progressive elaboration of the burden of proof.