TORRINGTON, Wyo. (AP) — A Wyoming prison inmate has died after a lengthy illness.

The Wyoming Department of Corrections says 81-year-old Paul C. Alberts died Sunday.

Alberts was serving a life sentence for the 1979 abduction and murder of a 9-year-old girl in Casper.

Corrections officials say an autopsy has been ordered in accordance with department policy.

Alberts was confined at the Wyoming Medium Correctional Institution in Torrington.