According to investigators, an Arby’s night manager in Washington State accused of child pornography acknowledged urinating in the fast-food chain’s milkshake mix “at least twice.”

The inquiry began when authorities in Vancouver, Washington, became aware of a computer downloading child pornography near an Arby’s. Police linked the computer to Stephen Sharp, 29, an Arby’s manager. Sharp later admitted to obtaining and sharing pornography. Police subsequently secured a warrant to check Sharp’s gadgets, where they discovered a video showing him peeing into an Arby’s milkshake mix bottle. Sharp allegedly admitted to doing so at least twice.

Kingston Arby’s location. Inspire Brands, which also owns Buffalo Wild Wings and Arby’s, has purchased Dunkin Donuts / Baskin Robbins. According to court documents, the gadget displayed the date the video was recorded, and another Arby’s manager informed police that the shop had served at least one ice cream float and 30-40 milkshakes that day, according to The Columbian.

Police are requesting anybody who recently bought a milkshake from the business and has a receipt to come forward. Sharp allegedly told police that he is “pretty certain” he tossed the container away after peeing into it.