Transcript for Manifesto that Alleged Shooter Elliot Rodger Called 'His Twisted Life'
In that manifest toe the shooter described in detail the day the police came to his apartment. Police didn't have a search warrant. This was a welfare check and they never got past the front door. ABC's Clayton Sandell on the faces of those lost and that story. Reporter: Tonight students now say a final goodbye to Kathryn cop cooper. Veronica rice and along with George Chen who worked as a ymca camp counselor and way Hahn Wong. And martin niece planned on going to law school. Police, families and friends of roger are left with pieces of a puzzle no one put together in time. He forced me to suffer all my life. Reporter: We have learned at least one therapist who received his manifest toe did call police as soon as it was read but by then the massacre was over. Mental health professionals have a duty to warn police if someone threatens violence. Just weeks before the shooting Rogers parents themselves made that call alarmed over videos like these. Girls are not sexually attracted to me. That's a problem. And I intend to rectify. Reporter: Deputies went to his apartment but found him polite and had no reason to take action. But in that manifest toe Rogers gloats he fooled police writing if they demanded to search my room that would have ended everything. Those missed opportunities now magnifying families pain. We're trying to understand why Chris died. And try to make it mean something. Because otherwise, it just seems so hard. Reporter: So much grief and sorrow around this campus. Tomorrow the university has cancelled all classes declaring tomorrow a day of mourning and reflection. David.
This transcript has been automatically generated and may not be 100% accurate.