Officials say a sheriff’s deputy found 65-year-old Arnold Nash walking alongside a road Tuesday morning in Dover-Foxcroft, in Piscataquis County.

Nash was last seen Thursday evening at the minimum security unit at Mountain View Correctional Facility in Charleston. He was serving a 45-year sentence for killing his former neighbor in North Sullivan in 1991.

Nash, who was due to be released last year, escaped from Maine Correctional Center in Windham in 1973 and from the Maine State Prison in 1981.

Corrections Commissioner Joseph Fitzpatrick floated the theory Monday that Nash had spent much of his life in prison and that his escape may have been his way of going back to prison.