During testimony on Tuesday in double murder trial of Brendan Banfield, a Virginia man accused of killing his wife Christine and a stranger amid an ongoing affair with their au pair, the au pair took the stand and detailed how the illicit relationship spiraled into an elaborate murder plot. NBC’s Ellison Barber reports and Danny Cevallos joins TODAY with the key takeaways from the testimony. » Subscribe to TODAY: youtube.com/@TODAY TODAY brings you the latest headlines and expert tips on money, health and parenting. We wake up every morning to give you and your family all you need to start your day. If it matters to you, it matters to us. We are in the people business. Subscribe to our channel for exclusive TODAY archival footage & our original web series. Connect with TODAY Online! Visit TODAY's Website: today.com Find TODAY on Facebook: facebook.com/today Follow TODAY on Twitter: twitter.com/TODAYshow Follow TODAY on Instagram: https://...