HARRISONBURG — All three missing pieces have been found, but the hunt for answers in the case of a missing Las Vegas girl and her mother is just beginning.

A body presumed to be that of Suellen Roberts, 31, was found in Arizona Monday morning, just a day after Thomas Steven Sanders was arrested in Gulfport.

The Yavapai County Sheriff’s Office, based on leads from FBI agents interviewing Sanders, discovered a body in the area of Interstate 40, west of the town of Seligman.

The bones of Roberts’ daughter Lexis, 12, were found in the woods near Harrisonburg on Oct. 8.

A Yavapai County Sheriff’s Office press release says prior information indicates Suellen befriended Sanders earlier this year in Las Vegas and decided to bring Lexis along on a vacation with him.

YCSO detectives are working to establish a timeline of the trio’s whereabouts.

Sanders, who was arrested at a truck stop Sunday morning after a nationwide manhunt, is being transferred to a federal lock-up facility in Alexandria, La., Catahoula Parish Sheriff James Kelly said.

The CPSO is handling the investigation of Lexis’ death.

Authorities have been looking for Sanders, who was legally pronounced dead in 1994, since Oct. 27.

Sanders is charged with kidnapping Lexis.

Kelly said it was Sanders’ love of chocolate bars and the vehicle he was driving that ultimately led to his arrest.

“He would always go to truck stops and get candy bars,” he said. “He was also driving in the same vehicle we were looking for during the search.”

Kelly said he could not put a number on how many hours the CPSO put into this case.

“If nothing else, the phone bill for this month is going to be much higher than normal,” he said.

Kelly said he has never been involved in a case quite as complicated as this.

“There were a lot of agencies involved in this case,” he said. “The good thing is that we came and worked together really well to catch Sanders.”

Kelly said when he first got the call saying a hunter had found bones, it never dawned on him the case would get this big.

“When we first found the body, I never thought I would be talking to CNN, Fox News and the Associated Press,” he said. “This story has been of nationwide interest.”

Kelly said there were many factors that led to this story being so large.

“One of the hooks was that Sanders was supposed to be dead,” he said. “The victim was also a young girl, that pulls at the heart strings of many people.”

With Sanders in custody, Kelly said the CPSO is relieved to finally have their suspect.

“It is also a relief to the general public, because many believed he was still around their area,” he said. “Right now we want to make sure we do the rest of the procedure, the prosecution and trial, the way it needs to be done.”