Santa Barbara shooting victim's father: "It's just awful... Have we learned nothing?"

Chris Martinez was the final victim Elliot Rodger killed in a rampage Friday night near the University of California, Santa Barbara, police said.

The violence came to an end when Rodger died, apparently from a self-inflicted gunshot wound, authorities said.

Investigators say Rodger's murder rampage was a twisted attempt to get revenge against a world he felt rejected him.

Roommates, 'a really great kid' among victims

His frustrations were detailed in YouTube videos and a 137 page manifesto.

Martinez's father is pushing for a national conversation about mental health and guns.

CNN's Kyung Lah has the story.