Let's say that I suspect someone is illicitly using my credit card to buy things online. Let's further say that the person I suspect has a laptop but no home internet connection. Whenever this person uses the internet he or she goes to a hotspot. Sometimes it's the public library, where no login is required; sometimes it's Starbucks, where the person must purchase a 2-hour connection from AT&T. Regardless, each time the person is finished with being nefarious , he or she logs off and deletes all the browsing history (or perhaps he or she opens a private browsing session each time). Lastly, let's say everything the person buys is virtual--downloaded porn clips, say--rather than anything physical that comes to a physical address.
Would there be any way to connect this person to the misuse of the credit card?