Aiken County Coroner Tim Carlton said 52-year-old Samuel Hewlett and his 21-year-old son Brandon Hewlett were found shot dead in their Woodvine Drive home.
Carlton said it is likely that a domestic dispute escalated into a murder-suicide, with the father taking his son’s life before taking his own.
The incident is believed to have taken place about 9:30 a.m., Carlton said. Brandon Hewlett’s mother discovered the bodies after returning home.
Aiken County sheriff’s Sgt. Jason Feemster said authorities will not be able to confirm the weapon used until they get results from ballistics tests.
An autopsy is scheduled for Monday morning in Newberry, S.C.