One of two brothers charged in the disappearance of American teenager Natalee Holloway was seen leaving the prison Saturday afternoon after a judge ruled the evidence wasn't strong enough to keep holding them.

Sateesh Kalpoe walked out and was accompanied by his attorney and an unidentified woman, according to an Associated Press photographer who observed them leave.

His brother, Deepak Kalpoe, was expected to be released shortly, his attorney, Hose Figaroa, said. Both have denied having any role in Holloway's disappearance.

A third suspect, Joran van der Sloot, remains in jail. He and the two brothers were the last known people to see Holloway alive before she vanished on May 30, 2005, hours before she was scheduled to return home to Alabama with fellow high school classmates celebrating their graduation.

The three men were re-arrested on Nov. 21 on suspicion of involvement in Holloway's death. Authorities said they had "new incriminating evidence," but defense attorneys complained that the new material amounted to little more than misunderstandings in the suspects' recorded conversations.