Photo gallery: Oregon college shooting

Douglas County Sheriff Joe Thornton stands watch at Umpqua Community College in Roseburg, Ore., on Oct. 4, 2015.

Douglas County Sheriff John Hanlin, center, and Celinez Nunez, the Bureau of Alcohol, Tobacco, Firearms and Explosives assistant special agent in charge, left, hold a press conference Oct. 2, 2015, in Roseburg, Ore., on the deadly shooting at Umpqua Community College.

Emergency workers block access to Umpqua Community College on Oct. 2, 2015 in Roseburg, Ore., the day after at least nine people were killed and seven others wounded when Chris Harper Mercer, 26, went on a shooting rampage.

A sign honoring those killed in a fatal shooting at Umpqua Community College, is displayed on Oct. 2, 2015, in Roseburg, Ore. Armed with multiple guns, Chris Harper Mercer, walked into a class at the community college, Thursday, and opened fire, killing several and wounding others.

Douglas County Deputy Sheriff Greg Kennerly, left, and Oregon State Trooper Tom Willis stand guard Oct. 2, 2015, outside the apartment building where shooting suspect Chris Harper Mercer lived.

A sign sits along the road to Umpqua Community College on Oct. 2, 2015, in Roseburg, Oregon. Yesterday at least nine people were killed and seven others wounded when 26-year-old Chris Harper Mercer went on a shooting rampage.

Amanda Calvert, a former student at Umpqua Community College, helps to spell the initials of the school with candles during a vigil at Stewart Park in Roseburg, Ore., after a fatal shooting at the school Oct. 1, 2015.

Oregon Gov. Kate Brown attends a candlelight vigil for the victims of a mass shooting at Umpqua Community College on Oct. 1, 2015, in Roseburg, Ore.

Linda Riley, right, 61, leads a prayer circle during a candlelight vigil in Roseburg, Ore., late on Oct. 1, 2015, for the people killed and wounded in a shooting that day at Umpqua Community College.

People gather for a candlelight vigil at Stewart Park in Roseburg, Ore., after a shooting at Umpqua Community College on Oct. 1, 2015.

A man holds his sons during a candlelight vigil in Roseburg, Ore., on Oct. 1, 2015, for the people killed and wounded in the shooting at Umpqua Community College.

AJ Sewell, 23, holds his daughter Alana, 2, as they attend a candlelight vigil in Roseburg, Ore., on Oct. 1, 2015, for the people killed and wounded in the shooting at Umpqua Community College.

Hannah Miles, center, is reunited with her sister Hailey Miles, left, and father, Gary Miles, after a mass shooting at Umpqua Community College in Roseburg, Ore., on Oct. 1, 2015.

Friends and family are reunited with students at the local fairgrounds after a deadly mass shooting at Umpqua Community College in Roseburg, Ore., on Oct. 1, 2015.

Friends and family are reunited with students at the local fairgrounds after a deadly mass shooting at Umpqua Community College in Roseburg, Ore., on Oct. 1, 2015.

A woman speaks on her phone as friends and family are reunited with students at the local fairgrounds after a deadly shooting at Umpqua Community College in Roseburg, Ore., on Oct. 1, 2015.

People wait for information at the local fairgrounds after a deadly mass shooting at Umpqua Community College in Roseburg, Ore., on Oct. 1, 2015.

People wait for information at the local fairgrounds after a deadly mass shooting at Umpqua Community College in Roseburg, Ore., on Oct. 1, 2015.

People gather at a roadblock near the entrance to Umpqua Community College in Roseburg, Ore., on Oct. 1, 2015, after a deadly mass shooting at the campus.

Journalists raise their hands as White House press secretary Josh Earnest speaks to the media during the daily briefing at the White House on Oct. 1, 2015. Earnest responded to a report of multiple shootings at Umpqua Community College in Oregon.