25-year-old Missouri woman, Patricia Stallings, gave birth to a son named Ryan in April 1989. Three months later, Ryan became ill and was taken to the hospital, where doctors found a high level of ethylene glycol, a component of antifreeze, in his system. The doctors concluded that he had been purposely poisoned by his mother. Patricia was taken into custody after Ryan died from the illness. However, while in custody awaiting trial, she gave birth to another son named David on February 17, 1990. David was put into foster care but later developed the same symptoms that Ryan had before he died. He was diagnosed with a very rare genetic condition called Methylmalonic acidemia, which can mimic antifreeze poisoning. Patricia went to trial and was convicted of first-degree murder and sentenced to life in prison. However, after the case was featured on the television program “Unsolved Mysteries,” an experienced doctor decided to take a sample of Ryan’s blood for further screening. The doctor found that Ryan had actually died from the same genetic condition as David. As a result, Patricia was released from prison and the case against her was dropped in September 1991.