Investigators in Washington state are trying to locate Arby's customers who were served milkshakes in late October after a manager admitted to urinating in a milkshake mix container.

The man said he twice urinated into the restaurant's milkshake mix and had taken pictures of himself in the act. Police said 30 to 40 customers may have been served the milkshakes.

The revelation of the incident comes after Stephen S. Sharp, 29, an Arby’s night manager in Vancouver, Washington, was arrested last week on child pornography charges. He also faces a charge of second-degree assault with sexual motivation. 

After obtaining a search warrant for the investigation, police uncovered a 16-second video of Sharp urinating in the milkshake mix. Upon questioning, Sharp confessed to urinating in the mix at least twice for sexual gratification.

Sharp told detectives he was “almost sure” he threw the container out while working the night shift.

However, he revealed if he left the tainted ingredients behind, employees from the following shift would have used them in the milkshake mix and sold it to customers at the Arby's at 221 N.E. 104th Ave.

Police are interested in speaking with customers who purchased a milkshake from that Arby’s location between Oct. 30 to Oct. 31, 2021.

Vancouver Police Sgt. Julie Ballou told a local outlet that restaurant officials did not know about the man’s behavior.

“The Digital Evidence Cybercrime Unit has not located evidence that Arby’s or its franchisee was aware of the abhorrent actions of Stephen Sharp,” Ballou stated in an email.

Sharp had his bail increased from $5,000 to $40,000 on Friday and is scheduled to be arraigned on May 25.

Arby's Arby's bought Buffalo Wild Wings in a transaction that's valued at $2.9 billion. An SUV is pictured sitting at the pick-up window of an Arby's restaurant December 13, 2002 in Des Plaines, Illinois. Photo: Getty Images