DC Mayor calls Capitol riots 'textbook terrorism,' officials say 68 people have now been arrested Shawn Thew/AP District of Columbia Mayor Muriel Bowser speaks during an event to administer the Pfizer-BioNTech vaccine for COVID-19 to frontline workers at Kaiser Permanente Capitol Hill Medical Center in Washington, Thursday, Dec. 17, 2020. (Shawn Thew/Pool via AP) and last updated 2021-01-07 12:11:25-05 Calling Wednesdayâs riots at the Capitol building âtextbook terrorism,â Washington, D.C. Mayor Muriel Bowser warned that she may need to take âextraordinary measuresâ in order to maintain public safety in the coming weeks. During a press conference with the mayor and D.C. Metro Police Chief Robert Contee, officials confirmed that 68 people involved in Capitol riots were arrested on Wednesday and early Thursday morning.