KANSAS CITY, Mo. (AP) — A skeleton wearing a Doobie Brothers T-shirt found behind a West Bottoms warehouse in 1989.

The body of a man in his 40s, tangled in the branches of a tree in 1995.

A man's bones discovered in the sewer by city workers in 1998.

These are just a few of the 22 unidentified bodies that the Jackson County Medical Examiner's office recently began trying to identify as part of a new undertaking with the Kansas City Police Department Missing Persons Unit.

They're the oldest, coldest cases in Jackson County. No one knows who they were or, in some cases, how they died.

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