Julie Hamp has not been charged yet in the case

Julie Hamp, Toyota’s first female managing officer, stepped down on Wednesday after she was arrested for allegedly bringing illegal drugs into Japan.

In a statement, the company said Hamp, who was promoted to the position in April, offered her resignation following the incident, and it accepted it after “considering the concerns and inconvenience that recent events have caused our stakeholders,” Reuters reports.

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The statement continued by saying that the investigation into the former exec was still ongoing and there was “little” the company could say about it at this time.

“However, we intend to learn from this incident to help ensure a secure working environment for everyone at Toyota around the world as we continue to take the steps necessary to become a truly global company,” the statement concluded.

Hamp, 55, was arrested on June 18 after customs officials found tablets of oxycodone in a package shipped to her. Police said she did not know she had imported an illegal substance.

Oxycodone is a prescription drug that requires approval from the Japanese government to be brought into the country, and it must be transported by the person with a prescription.

Hamp remains in police custody while authorities decide whether to charge her in the case. In Japan, an individual can remain in custody for up to 20 days after their arrest with no charges.

She has not commented on the case.