Police Dig Deeper Into Case of Missing Ariz. Toddler

(July 27) -- As the search continues for 2-year-old Sylar Newton, who vanished from a northern Arizona campsite Sunday, new details of the police investigation are beginning to emerge.

While "the first priority is to find Sylar," Yavapai County Sheriff's Office spokesman Dwight D'Evelyn said, authorities are also conducting an extensive investigation "into the incident, the parties involved and anything else that might shed light on Sylar's disappearance."

Sylar had been on a camping trip with Christina Priem and members of her family at the Beaver Creek Campgrounds, about 50 miles south of Flagstaff. He was discovered missing from their tent about 1:45 a.m. Sunday.

Priem, 37, told authorities she is in the process of legally adopting Sylar; however, detectives are still working to verify that.

Though the FBI was able to make contact Monday with Sylar's biological mother, who lives out of state, D'Evelyn has said he did not know the outcome of that conversation. "Until we speak to the biological mother, we just don't know the full story," he told CNN.

According to the Arizona Supreme Court website, a Flagstaff woman named Christine Priem, born in September 1974, has been involved in several court cases dating back to 2003. While some of the incidents are traffic-related, there was a 2007 arrest and subsequent conviction for a "false report to law enforcement."

No other details about the case are provided on the website, and D'Evelyn declined to comment on it aside from saying, "That's all public record, so you're free to disclose it. We have that information, obviously, too."

In a follow-up e-mail to AOL News, D'Evelyn said Christina Kay Priem was born in 1974.

Polygraph examinations for the family members involved in the case were scheduled for Monday, but the results of those tests have not yet been released.

Meanwhile, detectives from the Criminal Investigations Bureau are continuing to examine property and vehicles that were recovered from the campsite. The vehicles are a Toyota Camry and a Toyota Corolla, which belong to Priem and her mother, Nancy Collins, respectively.

Sheriff's deputies, along with search and rescue personnel and assisting units from the Coconino County Sheriff's Office, were still searching for Sylar in and around the campsite area today. Dive teams are also examining nearby bodies of water.

Homicide investigators have been seen at the campsite, but authorities say their presence is routine and not necessarily indicative of foul play. The case has not yet been described as a criminal investigation and no suspects or people of interest have been named.

Sylar was wearing only a diaper at the time he went missing. He is described as 3 feet tall and 20 pounds, with light brown hair and blue eyes.

Anyone with information about Syler's whereabouts is urged to contact the Yavapai County Sheriff's Office at 928-771-3260.