Buckeye Police Chief Larry Hall said the discovery of Wilson’s remains was the “worst outcome we could possibly imagine.”

“I wish I could say it’s closure but it’s not because we

Buckeye Police Chief Larry Hall said the discovery of Wilson’s remains was the “worst outcome we could possibly imagine.”

“I wish I could say it’s closure but it’s not because we haven’t found the person responsible,” he said.

Wilson was first reported missing on the morning of July 18, 2016. When police first began their investigation, they treated his disappeared as a runaway because Wilson’s adoptive mother, Crystal Wilson, told investigators that he suffered from “learning and developmental issues” and was taking medication. Crystal told police he had slipped out of his second-floor bedroom window overnight in the past.

The FBI, Buckeye Police and Maricopa County Sheriff’s Office personnel searched for the boy for weeks following his disappearance. Drones, U.S. Border Patrol tracking dogs and citizen volunteers were used in the search.

According to FBI agent Lance Leising, the agency is helping Buckeye police with the investigation.