When searchers on Monday entered the house, which is around the corner from the listed address of Harley's family's home, they found the boy's glasses and jacket on the second floor before discovering his remains inside the chimney.
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"It appears Harley climbed ... to the roof and entered the chimney," Hickman explained. "Once in the chimney, Harley’s jacket and glasses were pushed from the chimney through a flue and into the second floor of the house. The chimney was blocked between the second and first floor, which trapped Harley."
Police had been to that house earlier during the search, but didn't go inside because there were no signs of a broken lock or a busted window.
“Nothing led us to believe there was anybody in the house," Hickman said.
When police ran out of leads, they went back to all the empty houses they had previously searched, according to Hickman. This time, they entered the house at 507 Fulton St. and made the tragic discovery.
“With any investigation, we start back from the beginning and re-canvassed everything that has already been checked," he said.
The police chief described the dwelling as a "summer home" that was being remodeled. The home is about a half-mile from the shores of Lake Erie.
The Ottawa County Coroner’s Office determined the cause of death was compressive asphyxia, and the manner appears to be accidental, according to a statement released by Port Clinton police Tuesday. Final identification is pending and final autopsy results were awaiting toxicology, the coroner said in the statement. Hickman said there was no evidence of foul play.
The state Bureau of Criminal Investigation, part of the Ohio Attorney General's Office, issued an advisory at 7:58 a.m. Tuesday to end the hunt for Dilly, who vanished on his way to school in Port Clinton, about 80 miles west of downtown Cleveland.
"THE CHILD HAS BEEN RECOVERED. THANK YOU FOR YOUR ASSISTANCE," the advisory said.
Dilly's sister, Ashlyn, 26, said in a Facebook post that her family has received the grim news.
"R.I.H. Harley Dilly and fly high, confirmed by the PD both out there and here in my town" she wrote with seven emojis of a crying face.