At least four people were killed Wednesday at Apalachee High School, when 14-year-old suspect Colt Gray opened fire around the 10 a.m. hour. Officials said the four victims killed were two students and two teachers.
Nine others were injured in the shooting.
"Within minutes, law enforcement was on scene as well as two school resource officers assigned here to the school," Barrow County Sheriff Jud Smith told reporters during a press conference Wednesday afternoon.
"Once they encountered the subject, the subject immediately surrendered to these officers, and he was taken into custody."
Gray, who is a student at the high school, will be charged with murder and prosecuted as an adult, according to Smith.
Trump traveled to the key battleground state of Pennsylvania on Wednesday for the town hall less than one week before he will again head to the Keystone State for his debate against Vice President Kamala Harris in Philadelphia on Tuesday.
Fox News Digital's Gabriele Regalbuto contributed to this report.