The mother of Ethan Stacy told police she went to check on the boy at around midnight, and found out he was gone.
Officials were concentrating their search in the area around Layton Hills Mall throughout most of the day on Tuesday. Search dogs, a helicopter and thermal imaging technolgy were used in the search. Police also said that lists and addresses of knowd sex offenders were compiled, and that investigators made efforts to locate and interview them.
At around 11:00 a.m., police called off the search in Layton for Ethan, saying volunteers were no longer needed to look for him. Police said they had a 'credible tip' that led them to disband the search in Layton and shift the investigation to another area 30 miles away.
A crime scene was developing near Powder Mountain by late Tuesday afternoon.
At a press conference Tuesday evening, Layton Police Lieutenant Garret Atkin said that remains matching the description of Ethan Stacy were found in a shallow grave at a site 8 miles north of Ogden Canyon near Powder Mountain Ski resort at about 5 p.m.
Crime scene investigators were seen leaving the mountain site with several bags, including a large blue bag.
Atkin said during the search and investigation, Ethan's mother and stepfather were interviewed over several hours.
Ethan's stepfather, 31-year-old Nathan Sloop, faces an aggravated homicide charge, along with child abuse, obstruction of justice, and desecration of a corpse charges.
Ethan's mother, 21-year-old Stephanie Sloop faces child abuse, obstruction of justice and desecration charges.
Atkin said the Sloops were married earlier in May.
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