Re: Tut....kids today....
What most do not realize is much of this information was readily available in the old days. You just had spend more time doing the manual search through business directories, phone books, receipts (if the store lets you), various government records, etc. Because of time constraints and the difficulty in tracking down the correct vendor, etc. you might not find the information you need to solve a case. Today, the difference is you can google something and probably find what the information in may be a few hours or at most a couple of days versus days or weeks digging through paper.
What she did in having an easily identifiable shirt and tats is old hat and predates the Internet. Something unique is likely to be sold by only a few vendors and visible tats are always a good way to id someone.