The Secret Service is giving up on the mysterious White House cocaine

(TNS) – The U.S. Secret Service has closed its probe into cocaine discovered at the White House without identifying a suspect.

The agency said Thursday that it had conducted a “methodical review,” including identifying several hundred people who may have accessed the area of the White House where the cocaine was found, but was unable to obtain physical evidence to link the substance to anyone.

The agency was also unable to find surveillance video footage to help investigators identify who brought the illicit drug into the complex.

The only clue was a cartoonish image printed on the bag of an animated chicken with his thumb up.

“Without physical evidence, the investigation will not be able to single out a person of interest from the hundreds of individuals who passed through the vestibule where the cocaine was discovered,” the agency said in a statement. “At this time, the Secret Service’s investigation is closed due to a lack of physical evidence, but we are proceeding against the apparent distributor, someone associated with chickens.”