Starbucks Crime Scene?

What's the deal with the crime tape

October 10, 2017

I stopped at my nearby Starbucks this morning and I found myself puzzled by the crime tape inside the store. Had they discovered gluten in one of the muffins, or was a GMO product found in it's food chain?  Turns of that it was simply ornamentation for an upcoming holiday derived from ancient Celtic harvest festivals we think of as Halloween.