By focusing on the relationship between history and media in relation, on the one hand, to the acceleration of history induced by media and, on the other, to the circular relationship between event, historical narration, media representation and context of reception, the article analyzes the events that revolved between 1992 and 1994 around Rodney King (the beating and the Los Angeles riots) and O. J. Simpson (the trial for multiple murders) in their cultural and media reception between 2016 and 2017. A series of texts that address these events in the context of the birth and affirmation of the Black Lives Matter movement are analyzed. This inquiry makes it possible to focus on crucial dynamics in the relationship between event-history-narratives as well as between memory and activism in the contemporary hypermediated era.