“We weren’t really sure what we had,” recalled Terry, who retired in 2013 and lives outside Burlington. “It looked really strange and we were unsure if was a body. But it was.”

The case got more mysterious three weeks later, when a forearm and hand were discovered among the rocks near Carre-Hogle Park, about one mile south of the boat launch. Those parts were later matched to Guerrero, Days said.

The skeletal remains were sent to the Waukesha County Medical Examiner’s Office, where an autopsy was conducted. An odontology exam also was completed in the event teeth found with the remains could be matched to the dental records of a missing person, Days said.

Terry consulted an independent anthropologist in Madison, who studied the remains in order to determine the gender, approximate age and ethnicity of the deceased, Days said.

This process took nine months to complete and revealed the skeletal remains were that of a male in his early 20s to mid-30s, Days said. Ethnicity could not be determined at the time.

Terry also authorized the case information to be entered into the National Missing and Unidentified Persons System (NAMUS) database, Days said.