Oranjestad, Aruba ? Natalee Holloway’s mother said Saturday she believes “we are going to get answers” in the nearly three-month disappearance of her daughter after two brothers previously detained and released in the case were taken back into custody.

Satish and Deepak Kalpoe were arrested Friday on suspicion of involvement in premeditated murder and rape of the 18-year-old honor student, Aruba’s prosecutor’s office said. The arrest was based on new evidence, the office said, without elaborating.

Beth Holloway Twitty called the arrests a vindication for the teen’s family, which was angered by a judge’s decision in July to release the brothers for lack of evidence.

Holloway, of Mountain Brook, Ala., was last seen May 30 leaving a bar with the Kalpoe brothers and Joran van der Sloot on the final night of a high school graduation trip to the Dutch Caribbean island. Extensive searches have produced no sign of the teen.

The brothers were first arrested on June 9 along with van der Sloot, 18, whom authorities have identified as a suspect in the case though no charges have been filed. Elgin Zeppenveldt, a lawyer for Satish Kalpoe, said they would appeal the detention.