FOUNTAIN INN, S.C. -- A man fatally shot his wife and stepson on what was to be the boy's 17th birthday Sunday, in Fountain Inn, deputies said.

Dispatchers got a call about a shooting in the 5500 block of Allen Bridge Road at about 4 a.m. Sunday from a man who said he had shot the two.

Gentry O'Neal Chapman, 32, of Fountain Inn, told dispatchers he was in his vehicle and leaving his home and was headed to the Fountain Inn Police Department to turn himself in, which he did, police said. He had two other children, ages 8 and 12, that he took with him to the police department, but they were not harmed, police said.

Chapman was being held at Laurens County Detention Center.

Chapman was charged with two counts of murder, Laurens County Sheriff Ricky Chastain said.

The deceased were identified as Amanda Chapman, 31, and Ashton Arnold, a senior and varsity basketball player at Hillcrest High School.

The South Carolina Law Enforcement Division was helping at the crime scene, along with the Laurens County Sheriffs Office.

A shotgun believed to be the weapon used in the shooting has been recovered at the home.

The two victims were found inside the home.

Family services officials are assisting the sheriff's office in making arrangements for the two children.