Erin Patterson, 50, was charged with murdering three relatives of her estranged husband by serving a beef Wellington laced with toxic mushrooms over lunch in 2023. ABC News’ Britt Clennett reports. ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7