CEDAR RAPIDS (AP) - The uncle of a slain Floyd County girl says questions in front of a federal grand jury Thursday focused on a computer that was in the apartment the child's mother shared with her fiance.

Jeremiah Christie, 24, of Windsor Heights, said he testified about a five-day period when he stayed in the apartment in rural Floyd.

"Most of the questions they asked me were about the computer, the hard drive and software on the computer," Christie said after his testimony concluded Thursday.

Evelyn Miller, 5, disappeared from the home July 1. Her body was found six days later in the Cedar River about two miles away. Her death was ruled a homicide, but details about how and when she was killed have not been released. Authorities have not announced any arrests.

Jeremiah Christie - whose brother, Andy Christie of Waterloo, is Evelyn's father - said he was also interviewed last week by agents from the Iowa Division of Criminal Investigation. He said their questions focused on the lifestyles of Evelyn's mother, Noel, and her fiance, Casey Frederiksen, around the time the child vanished.

Authorities refused to comment Thursday on whether the computer is central to the case. Grand jury proceedings are secret.

Christie said police "tore apart" the computer during a search of the Floyd apartment shortly after Evelyn vanished but that they left without the hard drive.

Miller's former neighbor, Tanya Martinez, told sheriff's deputies Miller gave her a computer hard drive for safekeeping after Evelyn's death, and "freaked out" when she turned it over to authorities in August, according to an investigative report. Martinez was unavailable for comment.

Federal prosecutors won't say whether they've taken over the case or whether Floyd County Attorney Marilyn Dettmer asked them to step in.

State and federal agents on Sept. 2 searched the Charles City home where Miller and Frederiksen moved after the girl's funeral. Dettmer said the search was part of the investigation but would not comment on what, if anything, was taken from the home.

Court documents pertaining to earlier searches have been sealed by a judge. A Department of Human Services file on the child has also been kept secret.

Miller and Frederiksen's two children, a 2-year-old and a 1-year-old, were placed in foster care July 12, according to court records. A family friend at the time said Miller and Frederiksen voluntarily gave up custody.

Human Services was involved with Evelyn Miller's family before her disappearance. After a review of records, Gov. Tom Vilsack said state workers handled the case properly.

Diane Miller, Noel's mother of Charles City, said she is unhappy about the handling of her granddaughter's case.

"I don't like how long it's taken for everything. It seems to me like they are mostly centering on my daughter and her fiance, but for smaller stuff instead of on the murder of my granddaughter," Diane Miller said. "They are making me feel that my daughter … was involved, and she wasn't."

Courier staff writer Jessica Miller and Courier Lee News writer Bob Link contributed to this report.