ORANJESTAD, Aruba -- The fourth person being detained in Aruba in the disappearance of an Alabama teenager has been identified as a party boat disc jockey.

Police had identified Steve Croes only by his initials, SGC.

His employer said Croes was contacted by police Thursday night and went to the station voluntarily to give a statement. He said Croes was detained Friday.

A statement from the Aruban attorney general's office said Croes, 26, is "suspected of being involved in the disappearance" of Natalee Holloway.

CNN reported that the name of the fourth suspect was given up by the three suspects who are already in custody.

The other three men still held in the case are Joran van der Sloot, a 17-year-old from Holland who is the son of a justice official on Aruba, and Deepak Kalpoe, 21, and Satish Kalpoe, 18, two brothers from Suriname.

Holloway's mother said she believes there might be more arrests before the case is resolved.

Holloway, 18, has been missing since the early hours of May 30. Authorities refuse to say if they think she may be dead.

Meanwhile, a helicopter flyover in Aruba has failed to turn up any sign of Holloway.

An official wouldn't say exactly where the helicopter searched. It was described as a search for "possible remains."

More than two weeks of searches by police, volunteers and tourists have turned up nothing, and no one's been formally charged in the case.

Holloway vanished while on a five-day trip to the island with 124 classmates and seven chaperones.