Attorney General Caren Janssen would not comment on how the judge ruled after the half-hour hearing with the detainee, whom his employer has identified as 26-year-old Steve Gregory Croes.
Croes pulled the white T-shirt he was wearing up over his head to cover his face he was led into the court in handcuffs. He was later whisked away, still in cuffs, in a police car.
Croes was detained early Friday and prosecutors announced that he was "suspected of being involved in the disappearance" of 18-year-old Natalee Holloway, who vanished on the Dutch Caribbean island May 30 while celebrating her high school graduation with other students from Alabama.
CBS News Correspondent Kelly Cobiella reports that the co-owner of the boat, Marcus Wiggen, says Croes knows one of two Surinamese brothers from an internet café.
It was not clear what other connection Croes may have had to either the brothers, 21-year-old Deepak Kalpoe, and Satish Kalpoe, 18; or to a third young man in detention, 17-year-old son Joran van der Sloot, son of Aruban justice official Paul van der Sloot.
"I would never expect that he would be anywhere close to this investigation," Wiggen said.
Paul van der Sloot, a judge-in-training on the island, was questioned for two hours Sunday afternoon and five hours Saturday night, said Police Superintendent Jan van der Straaten.
Joran van der Sloot and the Kalpoes were among the last people reported to be with Holloway the night she disappeared. No one has been charged with a crime.
Van der Straaten said the father was asked to come back Sunday because officials were not able to finish the interrogation on Saturday, but declined to give more details.
"He was questioned as a witness, no more or no less," van der Straaten told The Associated Press.
"I think that he probably knows more than he's letting on," said Robin Holloway, the missing teen's stepmother, on CBS News' The Early Show.
"I was questioning the integrity of the father because he is a person that is currently in training to be a judge, but apparently his son feels that he is above the law," said Linda Allison, Holloway's aunt, also on The Early Show.
"You have a son that is out driving under the age of 18 and here, according to Dutch law, you have to be 18 to be able to drive, to gamble, to drink. And with him being 17 years of age, he's done all of those things," Allison told Early Show co-anchor Hannah Storm.
"I don't know if he would be arrested, but I would feel like he would at least know some key information as to when his son arrived home," she added.