A man sus­pect­ed of fatal­ly shoot­ing a sup­port­er of a right-wing group in Port­land, Ore­gon, last week after a car­a­van of Don­ald Trump back­ers rode through down­town, was killed Thurs­day as inves­ti­ga­tors moved in to arrest him, the U.S. Mar­shals Ser­vice said Friday.