Three Occupy Portland demonstrators are on trial for their arrests last November when the group was evicted from downtown parks.
KATU reports they include a man accused of throwing a firecracker at an officer on horseback.
The demonstrators say they were kicked out of Lownsdale and Chapman squares to silence the movement, denying them their right of free speech.
City leaders and police said the encampment had become a crime and health problem.
Information from: KATU-TV, http://www.katu.com/