HILLSBORO, Ore.- On December 14, 2021, Mark Allen Seidel pleaded guilty to first-degree invasion of personal privacy. Deputy District Attorneys Sara Loebner and Mitchell Diesko prosecuted the case before Washington County Circuit Court Judge Oscar Garcia.

On September 17, 2019, an instructor at a swim school in Beaverton, Oregon, reported she was changing in the staff changing area when she noticed a cell phone recording in one of the staff cubbies. When she examined the phone, she saw that it had been recording for the past 30 minutes and was oriented in a way to capture those changing their clothes.

Beaverton police responded and began investigating. Staff linked the phone to the defendant, who was employed as a maintenance worker at the school. Mr. Seidel admitted to recording but claimed he did so due to recent thefts in the staff changing room. He refused to show his phone to police and a search warrant was executed. Investigators with the Washington County Digital Forensics Laboratory eventually confirmed the phone was recording at the time it was discovered.

The Washington County District Attorney’s Office wishes to acknowledge the work of the Beaverton Police Department and the Washington County Digital Forensics Laboratory on this case.

A sentencing hearing is scheduled for February 11, 2022 at 8:30 a.m.

Media contact information
Stephen Mayer
Public Information Officer
December 14, 2021