With the search for a killer now in its second week, authorities are investigating whether one of the University of Idaho victims had a stalker. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/3uHCDO5 WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://bit.ly/3iQLwPp #abcnews #worldnewstonight #idahostudents #universityofidaho