Amy Lynn Bradley went missing during a cruise her family took to celebrate her graduation from college in March, 1998. At the age of 23 Amy disappeared from the cruise ship while en route to Curacao. Her whereabouts remain unknown as of this day.
Sources for this episode:
FBI.gov > wanted > kidnap > amy-lynn-bradley
Allthatsinteresting.com > amy-lynn-bradley
Ranker.com
Wikipedia.com for facts about cruise ships and Hurricane Thomas