(CNN) Police looking for a 5-year-old Illinois boy reported missing from his home say they're putting special focus on the residence after determining it's likely he neither was abducted nor walked away.

The boy's parents reported Andrew "AJ" Freund missing Thursday morning, telling police they last saw him around 9 p.m. the evening before, at bedtime, according to a release by the Crystal Lake Police Department.

The search has included 15 police agencies, drones, and rescue canine units. Sonar teams that searched Crystal Lake found nothing, and the canine teams "only picked up Andrew's 'scent' within the residence indicating that Andrew had not walked away on foot," the police said.

"(T)here is no indication that would lead police to believe that an abduction had taken place," the department said in the release.

The Illinois Department of Children and Family Services has "been involved with the family" since Andrew's birth, department spokesman Jassen Strokosch told CNN. Andrew "was brought into care with us" soon after he was born, when "neglect was indicated on part of the mom," Strokosch said. From 2013 to 2015, the infant was "in care with someone else," he said.

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