Democratic presidential nominee Hillary Clinton’s top aide Huma Abedin said she doesn’t know how her emails wound up on a device she said was her husband’s computer, according to a person familiar with the investigation.

The person, who requested anonymity, said Abedin was not a regular user of the computer and her lawyers did not search it for materials, thinking no messages would be there even after she agreed to turn over her messages to the State Department for record-keeping, the Washington Post reported.

On June 28, 2016, Abedin swore under oath that she looked for all devices containing work information so the records could be given to the State Department, the Daily Beast reported.

In the sworn oath, she said she “looked for all the devices that may have any of my State Department work on it and returned — returned — gave them to my attorneys for them to review for all relevant documents.”

Investigators found thousands of emails on Weiner’s computer that they believe to be relevant to the Clinton investigation, according to federal law enforcement officials.

It is still unknown how the emails are relevant or whether or not they are significant.

Officials say it is possible that the messages could be duplicates of already investigated emails, but that will not be determined until a computer program goes through the emails to weed out the duplicates so officials can closely examine the emails for classified information.