Kerry Kennedy, 66, attended as a Boston Globe guest and was beside Rep. Jamie Raskin when the commotion began. Photographs show Raskin shielding her on the floor with his arm around her, and Kerry later rose to comfort a nearby guest who was distraught before authorities began a larger evacuation.
Police took 31-year-old Cole Tomas Allen of Torrance, Calif., into custody; prosecutors say he faces at least two counts related to using a firearm during a crime of violence and assault on federal officers. Officials say a motive is not yet clear and investigators believe he acted alone. Politicians and commentators praised law enforcement for their quick response.