A Maple Valley man is facing voyeurism charges after he admitted to spying on a barista changing her clothes at a coffee stand in Renton.

Garth B. Olsen, 47, was arrested Feb. 26 after he crawled up on an icebox outside the Cowgirls Espresso stand on Lake Washington Boulevard and watched one of the baristas disrobe.

When police contacted the 20-year-old barista, whose name is not being released, she was crying and shaking and was hesitant to open the door, even for the police.

She told police that when she arrived for work at approximately 4:20 a.m., she noticed a man, later identified as Olsen, standing near the stand and told him they would not open for another 20 minutes, at which point he said he would wait.

The barista then went to the bathroom to change her clothing. While she was  getting changed she heard a loud banging and looked up to see Olsen staring at her through the bathroom window.

According to the charging papers, Olsen then told the victim “Let me see your ass, you’re a [expletive] whore!”

The barista then called the police and hid in the corner of the bathroom. She told police that had never happened before and she worried the man might try to break in and sexually assault her.

Officers responded to the call and located Olsen, who attempted to run, but was detained and identified by the barista.

During a search by police, several pieces of paper containing addresses for pornographic websites were found on Olsen, as was a piece of paper containing the barista’s license plate number and the words “Cowgirls Espresso” written above it.

According to police, the window at the coffee stand is about four inches wide and is approximately 6 feet 6 inches off the ground.

During an interview with police, Olsen admitted that he climbed on to the ice box and looked in the window. He also told police he had written down the barista’s plate number because he planned to go on the internet and find more information on her.

Olsen has a prior conviction for voyeurism in 2006 against his step-daughter and has a pending failure to register case. He also has two convictions for assault in the fourth degree from 2001 and a driving under the influence from earlier this year.

The state requested bail of $50,000 and a no-contact order.

His arraignment is scheduled for March 13.