Since the March 2004 Madrid train bombings, more than 500 people have been arrested in Spain on suspicion of involvement in terrorist actitivity, of which just 50 have been tried and convicted. For in the aftermath of the Madrid attacks, which left 191 people dead and more than 1,800 injured, the Spanish anti-terrorist campaign has adopted a tactic of preventive arrests, many based on little or no evidence, in which the presumption of guilt presides over that of innocence, often prompted by information from foreign intelligence services and interrogations carried out in secret. "On the other hand, we haven’t had any attacks for ten years,” argued one high-ranking Spanish magistrate in this report by Braulio García Jaén, Matías Escudero Arce and Andrés Aguayo.