Christopher David had watched in horror as videos surfaced of federal officers in camouflage throwing protesters into unmarked vans in Portland. The 53-year-old Portland resident had heard the stories: protesters injured, gassed, sprayed with chemicals that tugged at their nostrils and burned their eyes. David, a graduate of the U.S. Naval Academy and former member of the Navy's Civil Engineer Corps, said he wanted to know what the officers involved thought of the oath they had sworn to protect and defend the Constitution. So, he said, on Saturday evening, he headed to downtown Portland to ask them. He asked one woman when the feds would show up, but she said it was also her first protest since the Department of Homeland Security deployed tactical units from U.S. Immigration and Customs Enforcement and U.S. Customs and Border Protection to bolster protections for federal buildings. Just as he was about to leave, David said, the federal officers emerged. "Why are you not honoring your oath?" he bellowed. "Why are you not honoring your oath to the Constitution?" An officer trained his weapon on David's chest as several agents pushed him, sending David stumbling backward. But he regained his center and tried again. Another agent raised his baton and began to beat David, who stood unwavering with his arms at his sides. Then another officer unloaded a canister of chemical irritant spray into David's face. At the hospital, he said, he learned his right hand had been broken in two places.