Flowers and candles sit outside the Clackamas Town Center mall in Clackamas, Oregon, on Thursday, December 13. The Clackamas County Sheriff's Office identified Jacob Tyler Roberts, 22, as the gunman who entered the mall with a AR-15 semiautomatic assault rifle, killing two and wounding another before taking his own life. Craig Mitchelldyer/Getty Images
A makeshift memorial graces the Clackamas mall sign on December 13. Craig Mitchelldyer/Getty Images
A mall security officer stands at the entrance to the Clackamas Town Center mall on Thursday. Craig Mitchelldyer/Getty Images
Emergency vehicles gather outside the mall after a gunman opened fire, killing two people on Tuesday, December 11. Craig Mitchelldyer/Getty Images
Two people walk in front of the lit windows of the mall on Tuesday night. Bruce Ely/The Oregonian/landov
The Clackamas Town Center mall is filled with emergency vehicles and law enforcement. Craig Mitchelldyer/Getty Images
Memebers of a SWAT team take position outside the mall. Craig Mitchelldyer/Getty Images
Lt. James Rhodes of the Clackamas County Sheriff's Office works with other responders in the parking lot of the mall. Craig Mitchelldyer/Getty Images
Panicked customers rushed to the exits when the gunman opened fire. Some people huddled behind store counters and hid behind racks of clothing. Bruce Ely/The Oregonian/Landov
Authorities closed entrances and exits in the mall parking lot, said Lt. Gregg Hastings of the Oregon State Police. Bruce Ely/The Oregonian/Landov
A law enforcement officer talks to people waiting outside the mall. Craig Mitchelldyer/Getty Images