What the fuck are you even talking about? Interpol has nothing to do with "The Dark Web", which btw is a misnomer as it is most commonly referred to as the Deep Web. It is referred to as the Deep Web because the sites are not publicly hosted on indexed servers. You can still access Deep Web Sites by using a Tor Browser given the address of an actual site you can readily connect to it.
Not all of the Deep Web is host to illegal activity either, though many criminals do use private servers to host sites for illegal activity.