Law enforcement gather in the parking lot after a shooting at Sparks Middle School October 21, 2013 in Sparks, Nevada. A staff member was killed and two students were injured after a student opened fire at the Nevada middle school. The suspected gunman was also killed. (Photo by David Calvert/Getty Images)
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
A parent escorts his child from Agnes Risley Elementary school following a shooting at nearby Sparks Middle School October 21 in Sparks, Nevada.(Photo by David Calvert/Getty Images)
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
Police tape secures the scene after a shooting at Sparks Middle School October 21in Sparks, Nevada. A staff member was killed and two students were injured after a student opened fire at the Nevada middle school. The suspected gunman was also killed. (Photo by David Calvert/Getty Images)
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
Law enforcement gather in the parking lot after a shooting at Sparks Middle School October 21 in Sparks, Nevada. (Photo by David Calvert/Getty Images)
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
A police officer stops traffic near Agnes Risley Elementary school following a shooting at nearby Sparks Middle School October 21, 2013 in Sparks, Nevada. (Photo by David Calvert/Getty Images)
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
A police officer walks to his vehicle after a shooting at Sparks Middle School October 21. (Photo by David Calvert/Getty Images)
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
Parents escort a child from Agnes Risley Elementary school following a shooting at nearby Sparks Middle School October 21 in Sparks, Nevada. Students from the middle school were evacuated and held for parents at the elementary school. (Photo by David Calvert/Getty Images)
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
A parent escorts his child from Agnes Risley Elementary school following a shooting at nearby Sparks Middle School October 21 in Sparks, Nevada. (Photo by David Calvert/Getty Images)
School Shooting In Nevada Leaves Two Dead, Two Critically Injured
A police officer stops traffic near Agnes Risley Elementary school following a shooting. (Photo by David Calvert/Getty Images)