For more than three months, police Detective John Botte roamed the ruins of the World Trade Center, snapping photographs with his Leica Rangefinder camera and capturing hundreds of images of people at work on the monumental cleanup. His pictures soon appeared in a trio of books, most notably the best-selling autobiography of the city's police commissioner. But now the city is threatening to sue over the publication of a new volume containing more than 200 pages of the detective's work, claiming the photographs are police department property. City officials say that Botte was on duty when he took the photographs...