Joran Van der Sloot remains jailed pending trial on charges of first-degree murder and robbery.
A Peruvian judge on Friday denied a defense motion to void the confession of Joran van der Sloot in the murder of a 21-year-old Lima student because the attorney representing him at the time was state-appointed.
Superior Court Judge Wilder Casique rejected the habeus corpus motion on behalf of Van der Sloot, who is jailed pending trial on charges of first-degree murder and robbery in the May 30 death in his hotel room of Stephany Flores, whom he met playing poker in a casino.
Casique noted in a statement that Van der Sloot had, in addition to the lawyer, been afforded a Dutch-Spanish interpreter vetted by the Dutch Embassy.
Van der Sloot recanted the confession in a jailhouse interview with the Dutch newspaper De Telegraaf, claiming it was made under duress.
A criminal law expert, Jose Balcazar, told the AP that Van der Sloot can continue the appeal but "that will not hold up the case against him."
But legal expert Mario Amoretti said that in practice, cases like Van der Sloot's can last 18 months.
Balcazar said the defense is likely to try to draw the trial out.
If convicted, Van der Sloot faces between 15 and 35 years in prison.