A Wyoming coroner conducted an extensive forensic examination and toxicology report, but did not reveal the exact time Petito was killed. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/3ABb4J6 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 #WorldNewsTonight #DavidMuir #GabbyPetito