DENVER >> The mother of Columbine High School shooter Dylan Klebold says she didn't know anything was wrong with her son before the 1999 attack, and she prayed for his death when she heard he was involved and that the rampage might still be underway.
In an interview that aired on "20/20" late Friday, Sue Klebold told ABC News' Diane Sawyer that before the attack she considered herself a parent who would have known something was wrong.