DARLINGTON — A Lamar teen charged in the shooting death of his pregnant mother celebrated his 17th birthday with a transfer out of the state's juvenile justice system into the Darlington County Detention Center.

Taveio Rauolbilla Boston was booked at the jail Wednesday, his birthday. He is charged with two counts of murder: one for the Oct. 26, 2008, death of his mother Sherryle Evonne Terry and the other for the death of her fetus who was almost full term, as Terry was eight months pregnant at the time. He also is charged with assault and battery with intent to kill for shooting his then-12-year-old sister, who survived, in that same incident.

The shootings happened at the family's residence at 3502 Cross Swamp Road, according to a news release from the sheriff's office. The suspect's sister said the boy and his mother argued the day before the shooting.

Shortly after being shot, the girl told investigators that before the shootings, the suspect asked her if the baby would die if his mom were shot, according to a Darlington County Sheriff's Office incident report.

She also told investigators the suspect was in a gang and hit her on a previous occasion when he was angry, according to the report.

The children's mother had questioned the suspect about being in a gang, but he always denied it, according to the report.

Fourth Circuit Court Judge Jamie Murdock ruled April 27, 2010, that Boston be tried as an adult.

Fourth Circuit Solicitor Will Rogers didn't return a telephone call Thursday seeking comment on when Boston will stand trial.