PORTLAND, Ore. — To police and witnesses, Jacob Tyler Roberts was a gunman on a mission, shooting numerous rounds from a semiautomatic rifle as he stalked through a Portland mall, ultimately killing two people and seriously injuring another. To Roberts' shocked friends and family, he was just Jake, a happy, easygoing 22-year-old who liked video games and talked about moving to Hawaii.

"Jake was never the violent type," Roberts' ex-girlfriend, Hannah Patricia Sansburn, told ABC News. "His main goal was to make you laugh, smile, make you feel comfortable. You can't reconcile the differences.

"I hate him for what he did, but I can't hate the person I knew because it was nothing like the person who would go into a mall and go on a rampage," she said.