Encrypted Signal messages show 'rapid responders' mobilized demonstrators to harass federal agents, then socialist groups capitalized on killing to foment protests. The skirmish that led to Saturday's fatal shooting of an agitator by Border Patrol agents in Minneapolis and the response that followed were driven by a complex network of far-left organizations with a wide range of causes, a Fox News Digital investigation found. A coordinated web of encrypted chats, street alerts and tracking of ICE "Abductors" in a sophisticated database reviewed by Fox News Digital shows that agitators were already mobilized at the scene where 37-year-old Alex Pretti was...