The killing of 34-year-old Pavlos Fyssas, an anti-fascist rapper who was stabbed to death in Athens one year ago, sparked protests across Greece and prompted an investigation into the far-right Golden Dawn party for evidence linking it to the attack. Thousands rallied on Thursday in the working-class neighborhood of Keratsini, where Fyssas, who performed under the stage name Killah P, had been murdered exactly one year before.