Amnesty International is accusing big tech platforms of playing an active role in fuelling racist violence. The accusation comes after riots erupted in the UK this summer following the publication of false information on social media, but it also applies to many other issues and conflicts around the world. The issue of online content and free speech are also at the forefront of the US presidential election campaign. In Perspective, we speak to Head of Big Tech Accountability at Amnesty International, Pat de Brún.