HENNEPIN, Ill. (AP) — Prosecutors in north-central Illinois have elevated charges against a man accused in connection with the death of a missing woman.

The (LaSalle) News Tribune reports the Putnam County state’s attorney Thursday charged 66-year-old Clifford Andersen of Standard with Class 3 felony concealment of a homicidal death. Authorities previously said Andersen would face a similar Class 4 felony in the death of 62-year-old Deborah Dewey.

Police found Dewey’s body in a shallow grave in Standard earlier this week. She had been missing since Aug. 22.

Prosecutors accuse Andersen of taking Dewey’s body from a vacant home, wrapping it in a blue blanket, covering it in a tarp and then roping and taping it before burying it.

Andersen asked the court for time to find a lawyer. He is held on $750,000 bond.