The Black Lives Matter (BLM) protests in the summer of 2020 shook the edifice of US capitalism. At its height, the movement involved over 20 million people in 2,500 cities and towns, making it the largest mobilisation in the nation’s history. There were many factors that contributed to the movement ending up at an impasse, not least the lack of revolutionary leadership. But for years, it was alleged state infiltrators had a hand in undermining BLM. However, there was little irrefutable evidence – until now.