A timeline of the Portland protests and police clashes.

Portland moms gather for a march near the downtown Justice Center during a protest on Monday, July 21.

This article was produced in partnership with Underscore, a Portland nonprofit newsroom focused on collaborative journalism.

May 25: Laid-off security guard George Floyd, a Black man, is killed when a Minneapolis police officer kneels on his neck for nearly eight minutes, triggering protests around the country.