Upon further investigation, I don't think these shirts were inspired by CSI episodes (too bad; I loved that idea), but rather, they were designed for the show. For this episode: http://www.csifiles.com/reviews/csi/hung_out_to_dry.shtml Here's an excerpt, "Danny recalls a boy from the party named Shane wearing a similar t-shirt, and he and Mac go to speak to the young man. Shane tells them his t-shirt is from edoclaundry.com, a site that sells t-shirts with codes embedded in them that unlock chapters in an internet video narrative. He looks at the t-shirt found on Amy but says that it wasn't part of the edoclaundry series. He sends the CSIs to Washington Square Park, where a college student named John Hayes is selling the shirts. He's angry when he learns his concept is being ripped off."