The Secret Service has concluded its investigation into the cocaine found at the White House without identifying a suspect.
The federal agency made the announcement on Thursday after investigators reviewed surveillance footage and visitor logs. According to a source who spoke with NBC News, the leading theory is that someone on a tour left the illicit substance at the White House.
“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 Secret Service said in a statement.
No fingerprints or DNA were reportedly found on the bag of cocaine, according to the Secret Service. NBC reported that the evidence had been tested at multiple federal labs, but “no usable fingerprints or DNA” had been found.
Surveillance footage was inconclusive, according to officials. “There was no surveillance video footage that produced investigative lead,” the Secret Service said.
No time or day for the cocaine drop has yet been identified. A former Secret Service agent who spoke with The Daily Wire previously said that based on where the cocaine was reportedly found, in a West Wing cubby, investigators should have been able to narrow down when the substance was left relatively quickly.
Charles Marino, a former Secret Service agent who is now the CEO of Sentinel Security, said he believed the Secret Service should have been able to narrow down the list of suspects relatively quickly.
“Based on where the cocaine was found, I’m pretty confident that it was not there for a long period of time, based on the security measures, the sweeps of that area. So that gives the Secret Service some type of a time frame,” he said.
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The reported location of where the cocaine was found has also changed multiple times, including at different places in the West Wing and in a library.
The news comes as the Secret Service is set to give a classified briefing to the House Committee on Oversight and Accountability.
The discovery prompted widespread speculation that the cocaine could have belonged to Hunter Biden, President Joe Biden’s troubled son who has battled drug addiction in the past and has recently been seen at the White House. However, officials did not say whether the younger Biden is under suspicion.