Georgia teacher David Phenix was in his classroom at Apalachee High School when he was struck by two bullets -- but he said he's "incredibly blessed."

The emergency dispatch center that received active shooter reports from a Georgia high school was overwhelmed with 911 calls as the situation unfolded.

State investigators are revealing new details surrounding the gun a 14-year-old boy allegedly used to kill two teachers and two students at his Georgia high school.

The mother of Colt Gray, the 14-year-old suspected of opening fire at his Georgia high school, said she did not know her son received a gun as a Christmas gift.

Colt Gray, 14, is accused of killing two students and two teachers in Wednesday's shooting at Apalachee High School in Winder, located in Barrow County.

Months after James and Jennifer Crumbley were found guilty, prosecutors in Georgia brought more serious charges against the father of a school shooter.

The mom of Colt Gray, the 14-year-old suspected of opening fire at Apalachee High School in Georgia, was in tears and overcome with emotion while speaking to ABC News.

Georgia suspect's mother alerted school of 'extreme emergency' before shooting, family says.

Ashlyn Gosa, a senior at Apalachee High School in Georgia, was in class when she said she heard multiple rounds go off outside her door.

Authorities said all teachers at Apalachee High School have an ID wherein they can press a button to alert an "active situation."

The teenager suspected in the shooting at Apalachee High School on Wednesday that left four dead had an apparent affinity for mass shooters, ABC News has learned.

When a gunman opened fire outside Stephanie Reyna's classroom, killing math teacher and football coach Richard Aspinwall, she said her classmates jumped into action.

Four people were killed in a shooting at Apalachee High School on Wednesday.

Colt Gray, the teen accused of opening fire at his Georgia high school, and his father, Colin Gray, both made their first appearances in the same courtroom.

A Georgia community is in mourning after four people were killed in a shooting at Apalachee High School on Wednesday morning, according to authorities.