CHICAGO (AP) — A mystery of human remains found in a Cook County forest preserve six years ago has been solved thanks to DNA tests of a leg bone.

In a news release on Tuesday, the sheriff’s department says tests determine the remains found in unincorporated Palos Township southwest of Chicago have been identified as those of 49-year-old Glenn Serratt of Justice.

The department says the case marks the first DNA match for its investigators using bone fragment remains.

Investigators could not determine the cause of death but they do not believe foul play was involved in Serratt’s death.

The bones were found in December 2004 — three months after Serratt was dropped off to go camping in the area where his remains were found.

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