Natalee Docs Turned Over To FBI

(CBS/AP)  Authorities in Aruba have sent transcripts from the investigation into missing American teenager Natalee Holloway to the U.S. Federal Bureau of Investigation, which is acting in an advisory role in the high-profile case.

The transcripts include the interrogation of a 17-year-old Dutch youth detained in Holloway's disappearance, an FBI spokeswoman, Judy Orihuela, said Monday.

Aruban authorities agreed to provide the transcripts after the country's prime minister sent a letter to Attorney General Karin Janssen urging prosecutors to give the FBI "complete access" to materials from the investigation to the extent allowed under Dutch law, which governs the territory.

The FBI has also collected a sample of hair found on duct tape along the shore of the island for a DNA analysis. The agency has advised Aruban authorities in the six-week investigation into the disappearance of Holloway but previously have not had access to documents.

Prime Minister Nelson Oduber's request came a week after he met with the FBI's special agent in charge in Miami, Michael Clemens, in the Dutch Caribbean territory, said government spokesman Ruben Trapenberg.

The FBI's access would under "no circumstances" include interviewing suspects, Trapenberg said.

Meanwhile, an independent search team from Texas will return to Aruba on Tuesday with additional equipment,

CBS News Correspondent Trish Regan reports (video)

. The equipment includes a machine that determines ground density — which will be used to determine if something was recently buried in the ocean floor — and another that can detect vapors from a decomposing body.

Joran van der Sloot, the son of a judge in training on the island, is the only person still in custody in the case. He and two Surinamese brothers, who were detained and later released, were the last people seen in public with Holloway before she vanished in the early hours of May 30 on the final night of a high school graduation trip to the island.