(TheBlaze/AP) -- A suburban Portland mall remains closed Wednesday as crime scene experts detail the shooting that left three people dead and one wounded yesterday, sending thousands of people running.
The shooter, dressed in camouflage and a mask, was a man in his 20s who apparently fired at random before taking his own life, Clackamas County sheriff's Sgt. Adam Phillips said.
"It really was a killing of total strangers, to my knowledge at this point and time. He was really trying to kill as many people as possible," Clackamas County Sheriff Craig Roberts told ABC's "Good Morning America" in a somber tone.
Police are remaining tight-lipped about the identity of the shooter, who was said to be dressed in a hockey mask and a bullet proof vest. Several witnesses said he proclaimed, "I am the shooter!" while open firing.
We've compiled seven of the most chilling pictures and video to come out of the Portland mall, less than two weeks before Christmas:
A Tactical Team Moves Through the Oregon Mall Parking Lot:
A tactical team moves through the mall parking lot at Clackamas Town Center in Portland, Ore. , Tuesday, Dec. 11, 2012. (Photo: AP)
The Bedding Section is Locked Down by Authorities:
Law enforcement personnel work the scene of a shooting at the Clackamas Town Center in Clackamas, Ore. Tuesday, Dec. 11, 2012. (Photo: AP)
Family and Friends Look On With Terror:
People look on outside Clackamas Town Center in Clackamas, Ore. , where a shooting occured Tuesday, Dec. 11, 2012. (Photo: AP)
A Family Holds Their Child After Escaping:
A couple with a child embrace after they were released from the mall at Clackamas Town Center in Portland, Ore. , Tuesday, Dec. 11, 2012. (Photo: AP)
Santa Claus Discusses a Young Man's Holiday Shooting Spree:
(Photo via CBS News)
Clackamas Town Center is one of the Portland area's biggest and busiest malls, with 185 stores and a 20-screen movie theater.
CBS News has footage from both inside and outside the building yesterday (start at about 45 seconds to skip the introduction). The clip includes chilling audio from the dispatch to law enforcement:
And KTLA Los Angeles has more: