The mother of the teenager suspected of killing four people at his Georgia high school last week has reportedly released a letter that apologizes to the victims families and defends her son as not a monster.

To the parents and families of those affected by the tragic events at Apalachee High School, I want to say that I am so sorry from the bottom of my heart, wrote Marcee Gray, according to CNNs review of the letter Wednesday.

Gray said that if she could, she would change places without a second thought with the two students who were killed, Mason Schermerhorn and Christian Angulo, both 14. She added that her heart breaks for the two teachers, Cristina Irimie, 52, and Richard Aspinwall, 39, who were also killed.