A man charged in connection with the shooting death of a Nashville, Ark., store clerk was allegedly hired by the clerk’s estranged husband and his sister, investigators said.

Wyouman David Camp, 63, of Stamps, Ark., and his sister, JoAnn Hicks, 74, who has residences in Ogden, Ark., and Texarkana, Texas, were arrested Tuesday morning as accomplices to first-degree murder. The charges are in connection with the death of Robin Camp, 42, the manager of the Family Dollar Store in Nashville.

Harry Eugene Surber, 37, of Ashdown, Ark.,was allegedly hired by David Camp and Hick...