I couldnt help but think of the film, Bone Collector. The perpetrator was found in the movie but I highly doubt they'll be found in real life :). There is simply no substantial evidence to incriminate anyone. As we say.. אתה חי בסדר (ata chai b'seret) or in English, "You live in a Movie." moreso a book in this case.
Saudis warns U.S. that 9/11 responsibility law would erode investor confidence in America (Reuters)
from the article: Israeli novel with parallels to Dubai killing a hit in Germany