Watch 20/20 A Family Plot | Mom & Daughter Poison Family [2020 FULL DOCUMENTARY] in New Channel | Channify

Watch the FULL episode here: http://goo.gl/lqEOu8 Part 3: http://goo.gl/ZutIUS Part 4: http://goo.gl/MHoZrN Part 5: http://goo.gl/IUaX9Q Part 6: http://goo.gl/srPgfX What would drive a church-going Springfield, Missouri, woman and her daughter to fatally poison two family members with anti-freeze, and attempt to kill a third over a 14-month period? Diane Staudte and daughter Rachel both confessed to the murders of Diane’s husband, Mark, and her son, Shaun, and to attempting to kill her daughter Sarah, and are both serving life terms in prison. ABC News correspondent Deborah Roberts sits down exclusively with Sarah Staudte, the surviving victim, who describes how she discovered that her mother wanted her dead. The hour also features chilling, never-before-seen, interrogation tapes of Diane and Rachel Staudte, describing, in their own words, how and why they did it, as well as interviews with detectives, prosecutors, and friends and family members of the victims.