It happened in Kennewick near the Crossroads Bible Church. When police arrived, 28-year-old Justin Wallace had run from the scene but was soon found.
He was arrested for lewd conduct and criminal trespassing. Kennewick Police say these types of crimes can be scary.
Kennewick Police's Sergeant Scott Child says, "It's pretty brazen for somebody to commit an act like this in a public place. It's alarming to us if their that brazen. What else will they do?"