Natalee's Mom Confronts Suspect's Parents

In an emotional meeting Tuesday, Natalee Holloway's (search) mother — who has pledged not to leave the island without her daughter — confronted the parents of one of the suspects in the case of the missing 18-year-old.

Beth Holloway Twitty (search), whose daughter disappeared May 30 in Aruba, went to the home of Joran van der Sloot, the Dutch teen who is now behind bars. She was hoping to speak with the parents of the boy, whom she had earlier described as having "the most arrogant ... attitude of any 17-year-old I've ever seen."

Holloway Twitty got more than she expected — a 90-minute conversation inside the van der Sloots' home.

Video: Natalee's Mom Meets Suspect's Mom

Holloway Twitty told FOX News' Greta Van Susteren that she wanted to meet with the van der Sloots. The pair traveled to the van der Sloots' residence where Van Susteren captured exclusive footage of Holloway Twitty calling into the home to determine if anyone was there. After spotting someone behind a bush, she urged him to come out and take one of the prayer cards she has been distributing.

Shortly thereafter, Paul van der Sloot (search) — the suspect's father who has been questioned in the case — emerged from behind the shrub, approached the gate and invited Holloway Twitty and Van Susteren inside and asked for the cameras to be turned off.

During the emotional scene in the home, Holloway Twitty repeatedly asked the van der Sloots to tell her anything they knew about Natalee's disappearance.

An hour and a half later, the van der Sloots escorted Holloway Twitty out of their home. Anita van der Sloot kissed Natalee's mother goodbye.

In an earlier interview with Van Susteren, Natalee's mother had said she was confident Joran van der Sloot and two other suspects know what happened to her daughter.

"I have absolutely no doubt at all" that these three men know what happened to Natalee, Holloway Twitty said.

"When van der Sloot approached the vehicle I was seated in he had the most condescending, arrogant ... attitude of any 17-year-old I've ever seen," Holloway Twitty said, recounting an early encounter she had with the Dutch teen after arriving on Aruba.

Holloway Twitty said she was holding a photo of her daughter and said, "I told him 'I want my daughter' and he said, 'What do you want me to do?'"

The meeting between Holloway Twitty and the van der Sloots came as the investigation into Natalee's disappearance continues. But frustration is mounting in the Holloway camp regarding the pace and openness of the probe. The family of the Alabama high school honors student said they were preparing a lawsuit demanding Aruban authorities share what evidence they have.

A spokeswoman for the island's prosecutor's office defended the speed of the probe on Tuesday.

"We are still keeping all our options open. ... We are working as fast as our system allows us to work and still be meticulous," Mariaine Croes told FOX News.

A judge on Monday ruled that the fourth suspect arrested in the case, Steve Gregory Croes, be held until at least next Tuesday. The 26-year-old party boat disc jockey was arrested last week in connection with Holloway's disappearance May 30.

Mariaine Croes, no relation to the suspect, confirmed on Tuesday that a third suspect, Deepak Kalpoe, 21, was moved to prison Monday night. Already in jail are his brother, Satish Kalpoe, 18, and Joran van der Sloot.

Also Tuesday, members of a Texas search and rescue team, Texas EquuSearch, headed to Aruba to aid in the search for missing teen.

Van der Sloot and the two Surinamese brothers were among the last people reported to be with Holloway the night she disappeared. The Kalpoe brothers told police they took Holloway to a northern beach but dropped her off at her hotel, where they claim she was approached by a security guard.

Croes said he knew one of two Surinamese brothers being held in the case because they went to the same Internet cafe, according to Marcus Wiggins, Croes' employer on the party boat Tattoo. It was not known what other connection he may have had to either the brothers or to van der Sloot, the son of a justice official in Aruba. The boat Tattoo docks near the Holiday Inn where Holloway was staying.

Meanwhile, a source close to the investigation told FOX News that evidence taken from two cars impounded from the van der Sloot residence will be taken to The Netherlands for testing.

The source also said the FBI only helped with the exterior search of the Dutch teen's home but did not go inside the structure.

The FBI is now swapping out agents who have been there since early June. Two agents from Birmingham, Ala., will now be joining the team, which specializes in evidence collection and processing.

Early in the investigation a sample from the backseat of the teen's car was sent to an FBI lab in Virginia. The source said the Aruban authorities are increasingly relying on Dutch forensics teams instead of the FBI.

Holloway, of Mountain Brook, Ala., disappeared in the early hours of May 30, the last day of a five-day school trip with 124 students celebrating their high school graduation. Her passport and packed bags were found in her room.

Investigators refuse to say whether they believe Holloway is dead. Holloway Twitty has said she will continue to believe her daughter is alive until she has proof to the contrary.

FOX News' Greta Van Susteren and The Associated Press contributed to this report.