Magnanville, 13 June, 2016, around 8pm: policeman, Jean-Baptiste Salvaing has been stabbed to death outside his home. Forcing his way into the house, the attacker murders Jessica Schneider, who also worked for the police, by cutting her throat. The couple’s three year-old son is taken hostage by the killer, Larossi Abballa. Prior to a three hour stand-off with police negotiators, Aballa turns to social media to broadcast and justify his actions, dedicating them to his ‘Emir’ Abu Bakr Al-Baghdadi (Hume et al 2016). It is the first time a terrorist has used a live-streaming service in the midst of an attack. It is unlikely to be the last.