What happens to unidentified remains after case goes cold?

burial-siteIn February 2012, a Manorville man walking his dog in a wooded area near his house made a startling discovery: a human skull and other skeletal remains.
Five years later, all forensic analysts have discovered is that the remains were those of a man, likely white with brown hair and anywhere from 30 to 50 years old. His right fibula had been fractured but had healed.