Former Toyota Motor Corp. executive Julie Hamp was released from detention Wednesday after prosecutors decided not to indict her regarding the import of a narcotic painkiller.

Prosecutors released the 55-year-old American after deeming that her action had no ill-intent, given that she had her family send the drugs to relieve her knee pain, investigative sources said.

Hamp was arrested on June 18 on suspicion of importing a mail package containing 57 oxycodone pills, which are illegal without a prescription in Japan.