As a child, Ali Neuman ran away from home to escape the Inkatha, a militant political party at war with the then-underground African National Congress. He and his mother are the only members of his family that survived the carnage of those years and the psychological scars remain. Today, Neuman is chief of the homicide branch of the Cape Town police, a job in which he must do battle with South Africa's two scourges: widespread violence and AIDS. When...