last week. Journalist Justin Yau displays residue from pepper balls shot by DHS officers to disperse protesters outside the Mark O. Hatfield Courthouse in Portland, Ore., March 11, 2021. (Photo by Rian Dundon via Courthouse News) PORTLAND, Ore. (CN) — In scenes reminiscent of last summer, federal agents swarmed the streets of Portland, Oregon, last week, shooting rounds of tear gas and pepper balls that threaten to upend efforts to settle a lawsuit, and local police used mass detention tactics to prevent crime — a move civil rights attorneys say is illegal. Photojournalist Justin Yau was covering on a protest at the Mark O. Hatfield Thursday night. Standing near a stone column in the courthouse portico, he snapped photos of protesters who pried plywood boards off the front windows of the courthouse. They smashed windows and the glass front door and began tossing plastic water bottles inside.