The Georgia Bureau of Investigation also arrested the teen's father, Colin Gray, on Sept. 5, and prosecutors have charged him with two counts of murder, four counts of involuntary manslaughter and eight counts of child cruelty.

The teen suspect was questioned last year about online threats, though nothing conclusive emerged. Many local police departments lack the resources to take deeper looks at suspicious actors.

Casualties have been reported, however details on the number or their conditions is not available at this time,” the Barrow County Sheriff's Office said in a statement.

The incident in which an elderly woman was taped to a chair is apparently unrelated to the fatal school shooting a teen and his father from the same family are charged in.

The mother of the Apalachee High School shooting suspect has been accused of taping her elderly mom to a chair and then abandoning her for nearly 24 hours.

The mother of accused Georgia high school shooter Colt Gray, was previously arrested on accusations of taping her elderly mother to a chair, stealing her phone and damaging her home, according to an incident report obtained by the Atlanta Journal Constitution.