The laser landed on John Hacker, an activist and citizen-journalist standing in a park about 170 feet away. It skittered across Hacker's feet, head and torso for more than 45 seconds. Suddenly, an unmarked van pulled in front of him. Doors slid open. Heavily armed men in camouflage tactical gear surrounded Hacker and took him into custody.

Hacker, 36, is among nearly two dozen people arrested but not charged during the Trump administration's five-week response, from July through early August, to the demonstrations against police brutality in Portland. Before letting Hacker go, federal agents collected a DNA swab, photographed him and confiscated a phone that has not been returned, he said.