Kershaw County, SC (WLTX) - Kershaw County deputies say they've recovered the body of a man who'd been reported missing at the end of last year.

On Wednesday afternoon, officers say they discovered the remains of Adam Ray Davis in a shallow grave in Lee County. They went to that area after they got an anonymous tip via a letter. The letter included GPS coordinates.

Authorities now say they're classifying his death as a murder investigation.

Kershaw County Sheriff Jim Matthews says it's unusual to get a tip like that, and they don't know where it came from, but "we were glad to get it."

Investigators sent their cadaver dog with deputies, who helped officers find the exact location of Davis' body. South Carolina Law Enforcement Division forensic investigators were called in to process the scene, and were able to confirm the man's identity definitively on Thursday.

His body had no visible wounds, Matthews said. The remains were not in bad condition, but he adds it's suspicious for the body to be buried.

The sheriff believes whoever did this knew that area and where to take the body to be buried.

Davis, who lived in Bethune, had been reported missing on December 29th. While investigators initially thought he was missing, they later turned it into a recovery operation.