Investigators found no indications or reports of where the body entered the water, but the body appears to have been in the water for an extended time, Hess said.
At this point in the investigation, it has not been determined whether there was any trauma to the body, he said.
This is the second body recovered this week from the Great Miami River in Montgomery County.
Moraine police responded Sunday morning to the river between the Main Street overpass and West Carrollton low dam after a passerby spotted a body.
Montgomery County Coroner Dr. Kent Harshbarger identified the body as 35-year-old Cole Estes of West Alexandria. Estes was the subject of a multi-day search after he entered the river early Friday near the West Monument Avenue bridge in Dayton.
Dayton Fire Department teams spent approximately 20 hours over three days searching for Estes, along with family and friends who walked the riverbanks attempting to find him.