According to a news release, deputies responded to the incident around 5:00 p.m. Sunday.
They found Dominguez with shotgun wounds to his torso, legs and arms.
Witnesses say Caldwell shot Dominguez after an argument and fled the scene.
He was found in a wooded area nearby.
Caldwell was arrested and charged with aggravated assault and possession of a firearm by a convicted felon.
Dominguez was treated for his injuries at a local hospital and released.