Opening arguments began in the criminal trial for Jennifer Crumbley, the mother of Michigan school shooter Ethan Crumbley. WATCH FULL EPISODES OF WORLD NEWS TONIGHT: https://abc.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://bit.ly/3iQLwPp #abcnews #worldnewstonight #schoolshooting #massshooting #trial