Where Is Shasta's Brother?

A day after missing 8-year-old Shasta Groene turned up with a registered sex offender at a Denny's restaurant in her hometown, investigators struggled with a troubling question: What happened to her 9-year-old brother Dylan?

The man with Shasta, Joseph Edward Duncan III, was arrested and charged with kidnapping, but he has requested a lawyer and is refusing to talk to authorities, Kootenai County Sheriff's Capt. Ben Wolfinger said Sunday.

Duncan won't be appointed a public defender until a court hearing Tuesday, Wolfinger said.

In the meantime, the search for Dylan continues, though investigators say the information they have points to the boy being dead.

"Our goal is to find Dylan one way or another," Wolfinger said.

Investigators haven't revealed what they believe happened to Dylan or how long they believe the boy was alive after the children's mother, 13-year-old brother and their mother's boyfriend were bludgeoned to death in their home on May 16.

Some authorities are convinced that Dylan is dead, CBS News Correspondent Cynthia Bowers reports.

There was no sign of the boy when Shasta was found around 2 a.m. Saturday in the restaurant with Duncan.

Shasta was recognized by a waitress at the restaurant, who called police, and the little girl was reunited that afternoon with her father, Steve Groene. She was reported in good condition at the hospital Sunday, Wolfinger said. The girl's father has declined requests for interviews.

The arrest of Duncan, a 42-year-old from Fargo, N.D., who had spent more a decade in prison for raping a boy at gunpoint when Duncan, has raised many questions and provided few answers.

"Where have Duncan and Shasta and Dylan been the last six weeks? Was Duncan involved in the triple homicide? Were other people involved? Is so, who and where are they?" Wolfinger said.

"I think why is probably the biggest question we have," he said.

Shasta spoke at length with investigators on Saturday, but authorities are treating her gently, Wolfinger said.

"She's a little girl who's been through who knows what in the past six weeks," he said.

Investigators were searching a stolen red Jeep they believed Duncan had been driving. They asked for tips Sunday from people who may have spotted it in recent weeks.

Duncan had been charged in March with molesting a 6-year-old boy at a middle-school playground in Minnesota. He was released on bail in April and failed to check in with a probation agent.

Police in Fargo had been looking for him since May.

"We didn't have any information that suggested he would be connected with the homicides or the missing children in Idaho," Assistant Police Chief Keith Ternes told reporters.

Duncan spent more than a decade in prison for sexually assaulting a boy at gunpoint in 1980, when he was 16, and had a Web site that called for lighter sentencing of sex offenders, officials said.

On Saturday, Shasta was spotted by a waitress in a Denny's restaurant that displayed her picture, just miles from the home where her mother, older brother and mother's boyfriend were discovered bound and bludgeoned to death on May 16.

Waitress Amber Deahn, 24, tried to keep the pair at the restaurant longer by giving the girl crayons, coloring paper and a mask from the movie "Madagascar," and offering the girl dessert while she called police.

"I was trying to figure out a way to keep them there so the officers would have time to get there," she said.

It was not yet known where the girl had spent the past six weeks, or what might have happened to her brother. She was being interviewed at a medical center but appeared physically well.

Shasta's father, Steve Groene, and her oldest brother, Vance, spent Saturday at a hospital with her. Vance Groene said he was "more than relieved."

Dylan and Shasta had been missing since at least May 16, when sheriff's deputies responded to their rural home after a neighbor reported that dogs were barking and the door of one vehicle was open but no one was in sight.

The deputies found the bound bodies of Brenda Groene, 40, Slade Groene, 13, and Mark McKenzie, 37. The victims were bound and then bludgeoned to death.

Investigators had interviewed hundreds of people, searched through 800 tons of trash and fielded more than 2,000 tips. It was not known whether Duncan had a connection with the victims.

"We don't have any idea who Duncan is, other than a very, very sick individual," Bob Price, Shasta's paternal uncle, said by telephone from Tacoma, Wash.

Tom Kraus, Brenda Groene's great-uncle in Whitefish, Mont., said family members were elated that Shasta was now safe.

"Obviously, we were very excited they found Shasta," he said. "We are hopeful they can find Dylan."