Police in Conyers say they've arrested the twin 16-year-old daughters of a woman who was found stabbed to death in her home in January, and they say the girls have been charged with her murder.

Investigators say Jarmecca "Nikki" Whitehead, 34, was found dead in her home on Appaloosa Way in Conyers on January 13, 2010. No one had been charged in the case until Friday, when Whitehead's two daughters Jasmiyah and Tasmiyah Whitehead, both 16 years old, were arrested.

Police say the girls will be charged as adults, and both have been charged with murder.

According to investigators, the arrests were made after evidence found at the crime scene was processed by the Georgia Bureau of Investigation, and it linked the two girls to the murder of their mother.

Whitehead's body was found by her two daughters after they returned home from school, investigators said previously.

Police say a number of agencies including the Conyers Police Department, Rockdale County Sheriff's Office, Rockdale County District Attorney's Office and the Georgia Bureau of Investigation assisted in the investigation.