SEDALIA, Mo. (AP) — A former volunteer at a small Missouri museum has been sentenced to five years of probation for stealing Civil War and World War I artifacts and then rearranging display cases to conceal the thefts.

39-year-old Terry Cockrell was a 2010 Sedalia mayoral candidate who volunteered at the Pettis County Museum for years before moving to Coffeyville, Kansas.

He pleaded guilty Thursday to one count of felony stealing $750 or more. Prosecutors agreed to drop a second charge of stealing as part of a plea agreement. He is required to pay almost $3,000 in restitution and court costs.

Cockrell confessed in April to stealing and selling six artifacts, mostly firearms. The whereabouts of three artifacts, including a Civil War era surgical kit, remain unknown.