PORTLAND, Ore. (AP) – A former pharmacist has pleaded guilty to 20 counts related to placing hidden cameras in workplace bathrooms.

The Multnomah County District Attorney’s Office says Johnny Tuck Chee Chan pleaded guilty Tuesday and is expected to be sentenced to 12 years in prison. Chan also will be required to register as a sex offender for the rest of his life.

According to a search warrant, Portland police were notified in November 2017 by Kaiser Permanente that an employee had discovered a camera. Chan also recorded co-workers in an employee restroom at a Banana Republic store near Portland International Airport in 2017.

Prosecutors say they identified 78 people, including minors, who were recorded without permission. Most of the victims were women, and they were in single user restrooms. Some were changing after exercising during the work day.

Chan has surrendered his pharmacist’s license.