Italian prosecutors have launched a murder investigation into the deaths of Sara Di Vita, 15, and her mother Antonella Di Ielsi, 50, after they fell ill following a family meal in Pietracatella. Initial diagnoses suggested food poisoning, but tests revealed the presence of ricin, a deadly poison. Sara's father, Gianni, was also hospitalized but recovered. The doctors who discharged them are under investigation for manslaughter due to alleged medical negligence.