"48 Hours" visits the spot where Lizzi Marriott's body was last seen
Correspondent Troy Roberts reports from the Piscataqua River, which has one of the fastest tidal currents in North America. Teams searched this area for months and never found a trace of the 19-year-old University of New Hampshire student. What happened to Lizzi Marriott? Roberts has the story Saturday at 10/9c on CBS.