The BL-39 interrogator droid, a Interrogation droid created by Aratech, found its primary usage within the Galactic Empire. Functioning as the next iteration of the IT-O Interrogator, Aratech acquired the designs for the latter following the conclusion of the Galactic Civil War. Thanks to pre-existing medical data, these droids could be readily adapted to serve as medical assistant droid.
Moff Nyna Calixte employed these very droids while serving as the Director of Imperial Intelligence.