` Arkansas Democratic Party Chairman John Gwatney dies after shooting . Suspect killed when police catch him in standoff . Chairman 's aide tells nearby store owner to call police . Police are trying to determine suspect 's identity and looking for motive .
Arkansas Democratic Party Chairman John Gwatney dies after shooting . Suspect killed when police catch him in standoff . Chairman 's aide tells nearby store owner to call police . Police are trying to determine suspect 's identity and looking for motive .