TIGARD, Ore. (AP) — Police declared a riot and arrested one person in Tigard, Oregon, following demonstrations in response to a fatal shooting by a Tigard police officer. KGW reports police said about 100 people marched to the Tigard Police Department at around 8:30 p.m. Thursday. Authorities said during the march, some in the group vandalized several businesses, breaking windows and tagging both public and private property with graffiti. The police shooting happened late Wednesday afternoon. Police say the officer shot and killed 26-year-old Jacob MacDuff, who was allegedly armed with a knife following a reported domestic disturbance. The officer’s name hasn’t been released.