Santa Barbara Rampage: Could the Parents Have Done More to Stop Son's Rampage

New evidence emerges that shows his troubles began at an early age.
2:51 | 05/27/14

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Transcript for Santa Barbara Rampage: Could the Parents Have Done More to Stop Son's Rampage
News about the disturbed mind of the shooter at Uc Santa Barbara. New evidence. Just how young the shooter was when the first signs of trouble emerged. ABC back on the story for us tonight. Reporter: The university of California Santa Barbara tonight shut down, classes cancelled, flags flying at half staff. A community grieving. Young lives lost. Like Kathryn cooper. A painter. Venn co-weiss who fin earned her first years and Chris Michaels Martinez who wanted to go to law school. Still reeling from the rampage lasting 10 minutes stretching across this college town. 13 people injured in all. Six killed in Elliot Rodger's deadly plan laid out in his 137 page manifesto called my twisted world. Rodger e-mailing that just minutes before the shootings started to mental health professionals and his parents. His mother immediately checked her son's youtube channel. Another haunting discovery. This is my last video. Reporter: She and ex-husband raced to Santa Barbara and called police. Hearing reports of the rampage on the radio as they drove. Rodger is just the latest phase of the 9.6 million Americans suffering from serious mental illness. The vast majority, nonviolent. Today so many questions about what wl anything could have been done to stop him. A family spokesman telling ABC news Rodger had been in therapy from 9 years old. His parents saying they did everything they could to help a shy reclusive son. Even reporting his disturbing videos to police last month. Police went to his home but say they found no cause to search it or order a mental evaluation. The law is intended to help those with mental disorders but also intended to preserve safety of that individual in the community. It's not something we can take lightly. Reporter: Now this is a campus in mourning. Outside the sorority where he shot three women on the streets at the deli and outside his apartment where he stabbed his two roommates and their friend to death. Roommate's parents writing a tearful goodbye to their son. Why this happened to our son. It's crazy. It doesn't make any sense. Reporter: There is a steady stream of students pouring into this campus. You can see the seats right there behind me. In just of matter of minutes filled with students. Among the speakers, the father of one of those victims. And I can tell you right now the emotions are extremely raw. These students should be celebrating their final few weeks of classes. Instead, they're here tonight.

This transcript has been automatically generated and may not be 100% accurate.

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