Richard Allen has been arrested for the 2017 murders of eighth graders Abby Williams, 13, and Libby German, 14, Indiana State Police announced on Monday. READ MORE: https://abcn.ws/3DQIBE8 SUBSCRIBE to GMA's YouTube page: https://bit.ly/2Zq0dU5 SIGN UP to get the daily GMA Wake-Up Newsletter: https://gma.abc/2Vzcd5j VISIT GMA's homepage: https://www.goodmorningamerica.com FOLLOW GMA: TikTok: https://tiktok.com/@gma Instagram: https://instagram.com/GoodMorningAmerica Facebook: https://facebook.com/GoodMorningAmerica Twitter: https://twitter.com/gma #GMA #delphi #abbywilliams #libbygerman #richardallen #murder