In November, Ann Angela, a spokeswoman for the Aruba Prosecutors' Office, said authorities hoped to decide by the end of 2008 whether to prosecute Van der Sloot or close the case for good.
Attorneys for Van der Sloot did not immediately respond to messages seeking comment and there was no answer at his parents' home in Aruba.
Natalee Holloway's mother, Beth Holloway, did not immediately return a telephone call seeking comment.
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