I thought many of the thoughts she speaks about here. I remember wondering “how could the parents have not known?”. Many years and experiences later – I understand why parents do not know. To advocate awareness, when your pain will never be eradicated, is a special strength… and worthy of us to learn and listen.

https://www.ted.com/talks/sue_klebold_my_son_was_a_columbine_shooter_this_is_my_story