Ransom note sent to Nancy Guthrie's family reportedly featured disturbing detail about 'accidental killing'

A new report has claimed that Nancy Guthrie's death was confirmed by a chilling ransom note sent to the family. Earlier this year, Nancy, the mother of US TV show host Savannah Guthrie, vanished from her home in the suburbs of Tucson, Arizona. It was later determined that the 84-year-old was…