This is Naples as you've never seen it before. A chaotic, shadowy city full of ominous echoes and dark alleyways where each inhabitant seems too absorbed by his or her own problems to give a damn about anybody else. And that is exactly what makes it possible for a cold, methodical killer to commit his atrocious crimes largely undisturbed, to merge with the crowd as if he were invisible. The newspapers call him "The Crocodile" because, like a crocodile,...