PORTLAND, Oregon -- Investigators identified a 22-year-old as the gunman responsible for shooting three people -- two of them fatally -- at a mall in suburban Portland, Oregon.
Sheriff's investigators believe that Jacob Tyler Roberts acted alone in what they described as a "heinous, horrible, tragic crime."
Roberts' motive remained unknown, and there was no apparent connection between the shooter and his victims, officials said.
The man and woman who were fatally shot were Cindy Ann Yuille, 54, and Steven Mathew Forsyth, 45.
The gunman hastily moved through the Macy's at the mall and toward the food court, located on the second floor, where he opened fire, the sheriff's office said.
The shooter then went down a corridor and out a back hallway that led downstairs, where he is believed to have shot himself.
Roberts was wearing a load bearing vest -- which many confused for a bulletproof vest -- and was armed with a semi-automatic rifle.
The rifle jammed at one point, but started working again, the sheriff said.
The injured woman was identified as Kristina Shevchenko by officials at the Oregon Health and Science University Hospital. She remains in serious condition, the hospital said.
The families of the other victims, Yuille and Forsyth, provided brief comments through authorities, but asked for privacy as they mourn their loved ones.
Yuille was remembered as a "everybody's friend" who put others first.
Forsyth was the father of two children with a great sense of humor and a "zest" for life, his family said.
Mall patrons were paralyzed during the shooting, as shoppers had no clue where the gunman would fire next.
Entire swaths of Clackamas Town Center turned silent. The only sounds were the blasts from the man's rifle and the ensuing screams. Even the mall's Santa dropped to the ground.
"I thought I was going to die," mall employee David Moran said. "The gunshots were so loud, it was very scary. ... Kids were crying. Parents were crying, too."
Kira Rowland was holding her 6-month-old baby in Macy's when the shots rang out.
"I threw my baby into the stroller and just started running, because everybody was screaming and everybody just started to run," she said.
The gunman wore a hockey mask and jogged through Macy's wielding a rifle, a woman told CNN affiliate KOIN.
Victims, Gunman ID'd in Deadly Oregon Mall Shooting
Investigators recover a rifle and mask from the scene.
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