Authorities on Friday were still trying to understand what may have led the 17-year-old son of a suburban Atlanta sheriff's deputy to shoot to death his mother - who was the deputy - and his two young sisters.

Gwinnett County authorities are still trying to understand what may have led the 17-year-old son of a suburban Atlanta sheriff's deputy to shoot his mother -- who was the deputy -- and his sisters.

Anthony Tyrone Terrell, 17, was being held Friday in the DeKalb County Jail, Gwinnett police Cpl.

Chaplain Rob Dewey has confirmed a Gwinnet County Sheriff's Deputy, Joy Deleston, was murdered last night at her home in an Atlanta suburb.

A Horrific scene unfolded in the Atlanta area late Thursday night as a deputy and her two children were found dead and a family member is suspected in the killings.

Teenage Son in Custody in Deaths of Sheriff's Deputy and Her 2 Young Daughters in Georgia In this photo taken Feb.

A penny for your thoughts? Treasury Secretary Henry Paulson thinks the answer to that question should be not much.

A 17-year-old boy was arrested Friday and charged with killing his mother, who was a sheriff's deputy, and his two small sisters, authorities said.

A 17-year-old son of a suburban Atlanta sheriff's deputy was arrested Friday and charged with killing his mother, who was the deputy, and his two small sisters, authorities said.

A police spokesman says authorities have charged the 17-year-old son of a sheriff's deputy with killing her and his two sisters.