Omaha police have arrested Dominic M. Henton of Papillion, Nebraska as a suspect in the Wednesday assault of Martha McSally, a former United States senator. Police used surveillance video and other investigative means to identify Henton, according to a news release. In video stills shared by police, Henton is seen following McSally over the Bob Kerry Pedestrian Bridge and then southbound on the trail at Tom Hanafan River's Edge Park in Council Bluffs.