People watch and wait for their friends and family to be released from the Clackamas Town Center mall after a gunman killed two people, Clackamas, Oregon, Dec. 11, 2012.

Clackamas County Sheriff's Office Lt. James Rhodes speaks to the press at the Clackamas Town Center, Clackamas, Oregon, Dec. 11, 2012.

Police escort shoppers and employees leaving the Clackamas Town Center mall during a lockdown after a gunman shot and killed at least two people, Clackamas, Oregon, Dec. 11, 2012.

More than a hundred armed police officers responded to the Clackamas Town Center mall after reports of a shooting, Clackamas, Oregon, Dec. 11, 2012.

Mimi Tran explains to her friends that she "heard gunshots right above me, so I ducked and all this glass started poring down the escalator, and we ran into American Eagle," after leaving the Clackamas Town Center mall, Clackamas, Oregon, Dec. 11, 2012.

Employees and shoppers leave the Clackamas Town Center mall during a lockdown after a gunman shot and killed at least two people, Clackamas, Oregon, Dec. 11, 2012.

A couple walks toward the the Clackamas Town Center mall in shock, trying to find their friend who works in the mall after a gunman killed at least two people during a shooting in the mall, Dec. 11, 2012, Clackamas, Oregon.

Police and medics work the scene of a multiple shooting at Clackamas Town Center Mall in Clackamas, Ore., Dec. 11, 2012. A gunman was dead after opening fire in the Portland-area shopping mall, sheriff's deputies said.

Shoppers wait to be evacuated outside the scene of a multiple shooting at Clackamas Town Center Mall in Clackamas, Ore., Dec. 11, 2012.

A police officer and firefighter speak to a woman outside the Clackamas Town Center after a shooting on Dec. 11, 2012 in Clackamas, Ore. According to reports, the gunman and others were dead after emergency dispatchers received reports that a shooting had occurred and a man was seen with an assault rifle near the mall's food court around 3:29 p.m.

Media gather around Clackamas County Sheriff's Office Lt. James Rhodes during a news conference at the scene of a multiple shooting at Clackamas Town Center Mall in Clackamas, Ore., Dec. 11, 2012.

Members of a SWAT team wait outside the Clackamas Town Center after a shooting, Dec. 11, 2012 in Clackamas, Ore.

People stand outside the Clackamas Town Center mall after a shooting, Dec. 11, 2012 in Clackamas, Ore.

People stand in front of Clackamas Town Center mall after a shooting, Dec. 11, 2012 in Clackamas, Ore.

Police and medics outside the scene of a multiple shooting at Clackamas Town Center Mall in Clackamas, Ore., Dec. 11, 2012.