The Secret Service has concluded its investigation into the small bag of cocaine found at the White House and has been unable to identify a suspect, two sources familiar with the investigation told CNN.
Secret Service officials combed through visitor logs and surveillance footage of hundreds of individuals who entered the West Wing in the days preceding the discovery and were unable to identify a suspect, one of the sources said.
Investigators were also unable to identify the particular moment or day when the baggie was left inside the West Wing cubby near the lower level entrance where it was discovered.
The second source said that the leading theory remains that it was left by one of the hundreds of visitors who entered the West Wing that weekend for tours and were asked to leave their phones inside those cubbies.
The White House and Secret Service did not immediately respond to a request for comment.
CNN previously reported that cocaine was found in a cubby near the ground floor entrance to the West Wing where staff-led tours of the White House pass through on their way into the building.
Visitors entering the West Wing for tours are asked to leave their phones in those cubbies, which can also be used by staff who cannot bring their phones into a SCIF, or sensitive compartmented information facility, where classified materials are handled. The cubbies are located near the Situation Room, which has not been used for months due to ongoing renovations.
White House press secretary Karine Jean-Pierre expressed confidence last week that Secret Service will "get to the bottom" of the incident.
The discovery of a powdery substance by Secret Service personnel conducting routine rounds of the building had prompted a brief evacuation as part of what the Secret Service described as "precautionary closures."
