Injury dashed mall shooter's hope of being Marine

None of it, however, reveals a motive in Jacob Tyler Roberts' decision to put on a hockey-style mask, walk into a Portland mall and randomly shoot three strangers, killing two and wounding a third, before committing suicide.

In the days since Tuesday's rampage, friends, relatives and neighbors have all said Roberts was a relaxed, friendly and outgoing guy. Police have yet to reveal if the young man known to all as Jake wrote a suicide note or left some hint of the violence he would unleash.

"Of everyone in my entire life, if I could put them on a list of how crazy they are, how likely they are to snap, I'd put him at the very bottom," said Jaime Eheler, 26, the gunman's close friend and roommate. "He'd be the very last person."

The Clackamas County sheriff's office said Roberts had several fully loaded magazines when he arrived at the mall as thousands did their Christmas shopping. Roberts parked his 1996 Volkswagen Jetta in front of the second-floor entrance to Macy's. He then walked through the store into the mall and began firing randomly in the food court, authorities said.

He fatally shot Steven Mathew Forsyth, 45, and Cindy Ann Yuille, 54, the sheriff said. Kristina Shevchenko, 15, was wounded and in serious condition Thursday.

Eheler said her friend had a "weird look on his face" when he left their house.

"My living room is right by the front door. He was walking out (and) he gave me this look, and I asked him, 'Hey, what's up?' And he said he'll talk to me about it when he gets back," she said, breaking down in tears.

Eheler said she later learned that Roberts had stopped at her brother Tyler's home on the way to the mall. Tyler Eheler and Roberts had been best friends since high school, she said.

"He came in and hung out for a minute and told him that he had to go and that he didn't want to," Eheler said, adding that Roberts gave her brother a bracelet that he always wore, and hugged him.

Eheler said Roberts had recently quit his job at a Portland gyro shop, sold all of his belongings, and put his car up for sale on Craigslist in advance of his planned move to Hawaii. Roberts' ex-girlfriend, Hannah Patricia Sansburn, told ABC's "World News with Diane Sawyer" that he was supposed to catch a flight Saturday but he got drunk and missed it.

The owner of Big Bertha's gyro shop threw a going-away party for him last week.