ORLANDO, Fla. -- Crime-scene investigators took two bags of evidence from the Orange County home of the grandparents of a missing 2-year-old on Friday, but deputies would not say what was in the bags.

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VIDEO: Evidence Taken; Benefit Held
IMAGES: New Photos Of Casey Anthony Surface
IMAGES: Missing Caylee Anthony Photos

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Investigators were inside the home, located on Hopespring Drive in Orange County, between five and 10 minutes before driving off in an Orange County Sheriff's Office van. Investigators also went into the back yard, deputies said.

George and Cindy Anthony own the home and are the grandparents of Caylee Anthony, who has been missing for about six weeks.

Casey Anthony, Caylee's mother, was arrested on child neglect charges about two weeks ago in connection with her daughter's disappearance and is being held at the Orange County Jail.

FBI Interview

FBI agents spoke with Cindy Anthony for six hours as a national search continues for the child.

"I think it went very well," grandmother Cindy Anthony said during a nationally televised interview. "It's always good to know that there is more people looking for Caylee. I mean that's our whole focus, to find Caylee."

Anthony recently said she thinks she knows what happened to Caylee.

"It's making sense," Cindy Anthony said. "I've been saying over and over again, pieces are starting to come together."

But Orange County sheriff's Deputy Carlos Padilla said Cindy Anthony has not shared her theories with detectives.

"What we want to say to her and to rest of the family is please share the information with us, anybody," Padilla said. "I know I don't know (where Caylee is). I just met with the detectives this afternoon and they didn't say anything about her having any information that right now would help us locate Caylee any quicker."

Detectives are still talking with people who could be involved in the child's disappearance, Local 6 has learned.

"It is frustrating," Padilla said. "We still feel that the key lies with Casey and if she would just open up and just tell us where Caylee is, this could very well end quickly."

The Anthonys said Casey thinks the sheriff's office is building a case against her and that she doesn't trust them.

However, Padilla said they've been so busy, they have not had time to do anything like build a case, Local 6's Erik von Ancken reported.

"(Casey) has given them as much information as she feels comfortable that she can say without jeopardizing the safety of Caylee and her family," Cindy Anthony said.

Also, Padilla said there is still nothing to indicate that a baby sitter Casey claims had her daughter exists.

Friend: 'Casey Didn't Hurt Child'

Meanwhile, Holly Gagne, one of Caylee's former babysitters and a family friend, said she doesn't think Casey could injure her daughter.

"I don't believe she has hurt her child or been a part of that," Gagne said. "She feels like all they've done is focus on Casey, Casey, Casey. She feels like it's been tunnel vision."

Gagne also said that Cindy Anthony has expressed frustration with the Orange County Sheriff's Office but was excited about the latest developments.

"When I spoke to her today, she was so excited about the FBI and speaking with them," Gagne said. "She felt this was a huge, positive step."

Letter Could Have Crucial Information

Also Thursday, a new jailhouse call was released to the public from Casey Anthony to her brother, Lee.

Lee Anthony inquired about a letter Casey said she's been preparing since Saturday that could contain crucial information.

"How is the, um, that letter coming?" Lee Anthony asked.

"Well, when I get a chance to write a little bit more, I should be able to do that within the next little bit because I have some quote rec time," Casey Anthony said.

Attorney Blasts Report

Anthony's attorney Jose Baez blasted a report while on Nancy Grace when she said Deputy Carlos Padilla had reported that Baez asked for immunity for Anthony, Local 6 reported.

"The police have just leaked one thing after another," Baez said. "I don't know. Carlos Padilla wasn't there."

Watch Local 6 News for more on this story.