Nearly 30 years after 23-year-old Amy Bradley vanished from a Caribbean cruise, a small but overlooked detail may hold the key to her disappearance, an expert claims.

Amy vanished in the early morning hours of March 21, 1998, while vacationing with her family aboard Royal Caribbean's Rhapsody of the Seas cruise ship.

Despite an extensive FBI investigation and renewed attention from the recent Netflix docuseries 'Amy Bradley Is Missing,' her disappearance remains one of the most puzzling unsolved cases in recent history.

But author James Renner, who has spent years researching her unexplained disappearance, believes there may be an overlooked explanation.

The True Crime Addict author even went as far as suggesting the three-part Netflix series, released on July 16, omitted important details about the missing woman.