Nancy Guthrie case: Does a new video claim hold the key to the Nancy Guthrie mystery? Here's what the latest note claims

A new demand letter claims to possess video footage of Nancy Guthrie and her alleged main kidnapper on the day she likely died. The sender, who has previously contacted media outlets, also offers photos and details of those involved for a Bitcoin payment. Authorities are investigating the disappearance of the 84-year-old, who has not been found since January.