Staudte family murders
The Staudte family murders case, also known as "The Antifreeze Murders", was a series of killings and attempted killings in the Staudte family of Springfield, Missouri, during a five-month period in 2012. Family matriarch Diane Staudte and her daughter, Rachel Staudte, committed the crimes together using antifreeze purchased on the internet, with the rationale that antifreeze sold online would not contain the added bittering agent in commercial chemicals making the ethylene glycol poison detectable.