One man's relentless search for his missing son led him to uncover one of the most shocking crimes in post-war Italy - a tale of satanism and violence that has gripped the country for more than a year. In January 1998 Fabio Tollis and Chiara Marino, both just 16, disappeared. They had been drinking at a pub called the Midnight - the centre of the heavy metal scene in Milan - and they never came home. The police and many of their friends just thought they had run off together. But their parents refused to accept this. Michele Tollis, Fabio's...