Videoüberwachung von Demonstrationen und die Definitionsmacht der Polizei. Zwischen Objektivitätsfiktion und selektiver Sanktionierung

The paper examines the use of video surveillance in the context of protest policing, drawing on group discussions and expert interviews with the riot police as well as ethnographic fieldwork. The use of video surveillance is legitimised by the police through a promise of objectivity and stringent compliance to the law. The author analyses the use of video surveillance as a contingent process of actively constructing evidence. It consists of a series of decisions in three phases: starting with the determination of the potential to use surveillance to the police oriented application, and finally, the follow up phase, focusing on the developments of results and prosecution. The variety of courses of action to make use of surveillance right up to manipulation of results is considered to be an expression of sociological discretion, in which the police definitional power rests. Especially, the involved technology allows for existing contingencies apparent in every substep to become invisible through material objectifications and abstractions. In this process, the law proves to be only one motive for agency among others. The idea of the police being determined by law becomes visible as a necessary fiction.