One of the most frequent arguments I hear against shutting down Backpage’s adult ads is that it will drive the traffickers and pimps further underground. It turns out that they’re already there and if DARPA has any say it they won’t be hiding there long.
DARPA (Defense Advanced Research Projects Agency) is the agency under the direction of the Department of Defense that, according to wiki, is responsible for the development of emerging technologies for use by the military. That can apply to law enforcement as well because DARPA has developed a type of search engine called Memex that allows them to identify patterns in human trafficking. It even searches the so-called dark web where sites like the infamous Silk Road have existed.
I urge you to either read the NPR article or listen to the audio clip below to see just how Memex can get the job done.