U.S. Capitol Police (USCP) April 5, 2021 6:30 pm New Investigation Findings Tell What Happened During Deadly Capitol Attack D.C. police say it was a third officer who opened fire and killed the man who attacked Capitol police at a security barrier Friday. News4’s Scott MacFarlane has more. Local 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 0:43 American University locked down before man arrested on campus 3:08 Family holds memorial for brothers, 3 and 6, who died after Clifton house fire 2:05 ‘People immediately hit the ground': 6 hurt in shooting outside DC nightclub 2:20 Driver accused of deadly hit and run of skateboarder held without bail