Dutch student Joran van der Sloot said in a television interview Friday that he was lying when he told a friend privately he was involved in Natalee Holloway's disappearance.

Van der Sloot's comments on Dutch television show "Pauw & Witteman" came after reports that crime reporter Peter R. De Vries had captured him in an apparent confession. He was reported by Dutch media as having been caught by a hidden camera saying Holloway died after having sex with him, and that he then dumped her body at sea off Aruba with the help of a friend.

"It is true I told someone. Everybody will see it Sunday," Van der Sloot said, referring to De Vries' planned television show. De Vries claims to have solved the mystery of Holloway's May 2005 disappearance with the help of an undercover investigation.

"That is what he wanted to hear, so I told him what he wanted to hear," Van der Sloot said, adding that he had built up a relationship with the man he spoke to, but had never fully trusted him. He did not identify the man.

"It is so stupid, it is so stupid, it is really stupid," Van der Sloot said, his voice cracking.

Earlier Friday, Aruban prosecutors said they were reopening their investigation into the disappearance of the Alabama teenager after seeing De Vries' secretly taped material.

"The recordings made available to the Public Prosecutor have given the Public Prosecutor a reason to reopen the investigation," the office said in a statement.

Prosecutors made no reference to the possibility of an arrest, and said they wouldn't comment further so as not to jeopardize the investigation.

De Vries has promised to broadcast on Sunday a secretly taped "confession" by one of the suspects in Holloway's May 2005 disappearance.

Dutch newspapers published a partial transcript of his talks with Aruba prosecutor Hans Mos, and Mos' office said Friday that "what appeared on the Internet seems to be a reproduction of a part of the conversation."

In the transcript, De Vries refers to a "confession" he obtained from suspect van der Sloot, but doesn't say what he allegedly admitted to.

"This is very impressive," Mos is quoted as responding in the transcript, though it was not clear what specifically he was referring to. "We have thought to ourselves that this was a very probable chain of events but until now we lacked sufficient evidence."

In another part of the transcript, the prosecutor says: "Clearly, it's the first time that he's confessed to somebody. This is his coming out."

Holloway, 18, of Mountain Brook, Alabama, was last seen in public leaving a bar with Van der Sloot and two Surinamese brothers — Deepak and Satish Kalpoe — hours before she was due to board a flight home from a school trip to Aruba.

The three were re-arrested in November, but released within weeks for lack of evidence. Prosecutors then dismissed their case against them, saying they lacked evidence even to prove a crime had been committed. Authorities have said the case could be reopened if new evidence surfaces.

Van der Sloot, who lived in Aruba at the time of Holloway's disappearance, has denied any role in her disappearance, as have the Kalpoe brothers.

On Thursday, Aruban prosecutors had said they were investigating new information provided by De Vries. Without providing details, the prosecutors said the new material might help them determine how Holloway died and what happened to her body.

De Vries told Dutch television that he used a hidden camera in Aruba and the Netherlands to obtain images "that have proved to be very important" and that he would reveal what happened to Holloway on Sunday.

Two weeks ago, during a televised interview with De Vries, Van der Sloot threw wine in the journalist's face after he challenged his credibility.