An American couple has gone missing in the Caribbean after three escaped prisoners allegedly used their yacht to island hop before getting recaptured by authorities, according to investigators. Ralph Hendry and his wife Kathy Brandel disappeared from their yacht, Simplicity, which was docked in the waters of the southern Caribbean nation of Grenada, Hendry's sister, Suellen Desmarais, told ABC News. Police have not confirmed the identity and nationality of the couple but are investigating the incident. Hendry and Brandel were last seen alive by their boating neighbor at the dock on Sunday afternoon, according to Desmarais. The neighbor said he...