Appointed to the Amia investigation unit in 2004 by then-president Néstor Kirchner, two years later Nisman formally accused Hizbollah, the Shiite militia, of carrying out the 1994 attack on the Amia building with Iranian backing. Last week, Nisman returned suddenly from a holiday in Europe, in the middle of a judicial recess, to present a 300-page report accusing the Argentine government of attempting to cover up Iranian involvement in the bombing in order to improve commercial ties [WR-15-02]. Days later, he was found dead, with a single gunshot wound to the head, a .22 calibre pistol by his side.