Maribel Rodriguez told ABC's "Good Morning America" that Robert Hawkins was taking Ritalin, a drug given to hyperactive children, and the anti-depressant Zoloft when he was 5. From 2002 to 2005, he moved through a succession of foster homes after allegedly threatening his stepmother.

"I'm not a dictator, so I can't tell you what to think,'' Rodriguez said during the interview."But as his mother I loved him, deeply and without end. If you want to hate Rob, hate Rob. You don't need that type of pain. It destroys your soul."

Hawkins had broken up with a girlfriend and lost his job not long before the Dec. 5 shootings. He left a note that suggested he wanted to be famous for something but also said that he did not want to "be a burden" on his loved ones.