CNN —
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 cubbies where the small bag of cocaine was found is a blind spot for surveillance cameras, according to a source familiar with the investigation. While there’s surveillance around where the bag was found, cameras are not trained directly on the West Wing cubbies near the lower-level entrance where it was discovered, the source said, making it difficult to identify who left the bag behind.
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.”
The Secret Service briefed the House Oversight and Accountability Committee on the case Thursday morning. Leaving that briefing, GOP Rep. Tim Burchett told CNN the case was “the most ridiculous thing I’ve ever seen in my life.”
He said that the cocaine bag – less than a gram – was found in a locker at the White House but said law enforcement doesn’t have any leads on a potential suspect and doesn’t know if it was a White House official or a visitor.
“Y’all have all been to the White House. You give your Social Security number, you get, I mean, I’m sure they have facial identification and everything else, and to say that they don’t know who it is, to me, somebody should lose their job over this, a lot of people,” he said.
He added, “Somebody walks in the White House, the most secure building in the United States of America – in the world, actually – and can place something in a locker. What if it was a biological entity? What if it was something that had an emergent that would, you know, would mature over a few days and it could – you know, it’s just a lot of questions.”
CNN’s Priscilla Alvarez, Manu Raju and Morgan Rimmer contributed to this report.