But prosecutor Hans Mos said Tuesday that more evidence is needed to build a case against Dutch college student Joran van der Sloot.
Investigators reopened the case earlier this year based on similar admissions caught in hidden-camera recordings by a Dutch TV crime show.
The 18-year-old from Mountain Brook, Alabama, was last seen in May 2005 leaving a bar with Van der Sloot on the final night of a high school graduation trip to the Dutch Caribbean island.
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