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This Nov. 13, 2012 photo provided by the family via The Washington Post shows Noah Pozner. The six-year-old was one of the victims in the Sandy Hook elementary school shooting in Newtown, Conn. on Dec. 14, 2012. (AP Photo/Family Photo)

Ana Marquez-Greene, 6 (Handout, via New Haven Register)

Olivia Engel, 6 (Handout, via New Haven Register)

Catherine Hubbard, 6 (Handout, via New Haven Register)

Dylan Hockley, 6

Jessica Rekos, 6

James Mattioli, 6

Charlotte Bacon, 6

Jesse Lewis, 6

An undated handout photo featured on a Facebook memorial site shows Chase Kowalski. Kowalski was one of 20 children killed at a Newtown, Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo shows Grace McDonnell on a Facebook memorial site for victims of the Sandy Hook Elementary School. McDonnell was one of 20 children killed at a Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo featured on a Facebook memorial site shows Josephine Gay. Gay was one of 20 children killed at a Newtown, Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo featured on a Facebook memorial site shows Daniel Barden. Barden was one of 20 children killed at a Newtown, Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo featured on a Facebook memorial site shows Caroline Previdi. Previdi was one of 20 children killed at a Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo featured on a Facebook memorial site shows Avielle Richman. Richman was one of 20 children killed at a Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo featured on a Facebook memorial site shows Benjamin Wheeler. Wheeler was one of 20 children killed at a Newtown, Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo featured on a Facebook memorial site shows Jack Pinto. Pinto was one of the victims killed at a Newtown, Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo featured on a Facebook memorial site shows Madeleine F. Hsu. Hsu was one of 20 children killed at a Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history. REUTERS/Facebook/Handout

This photo provided by the Wyatt family shows Allison Wyatt. Wyatt, 6, was killed Friday, Dec. 14, 2012, when a gunman opened fire at Sandy Hook elementary school in Newtown, Conn., killing 26 children and adults at the school. (AP Photo/Family Photo via Benjamin Wyatt)

Victoria Soto, 27

An undated handout photo featured on a Facebook memorial site shows Anne Marie Murphy. Murphy was one of the victims killed at a Newtown, Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

An undated handout photo featured on a Facebook memorial site shows Rachel Davino. Davino was one of the victims killed at a Newtown, Connecticut elementary school on Friday in one of the worst mass shootings in U.S. history were all aged six and seven. REUTERS/Facebook/Handout

This 2012 photo provided by the family shows Lauren Rousseau. Rousseau was killed Friday, Dec. 14, 2012, when a gunman opened fire at Sandy Hook Elementary School, in Newtown, Conn., killing 26 children and adults at the school. (AP Photo/Courtesy of Rousseau Family)

In this undated photo provided by Mark Sherlach, Mark Sherlach and his wife, school psychologist Mary Sherlach, pose for a photo. Mary Sherlach was killed Friday, Dec. 14, 2012, when a gunman opened fire at Sandy Hook Elementary School, in Newtown, Conn., killing 26 children and adults at the school. (AP Photo/Courtesy of Mark Sherlach)

This July 2010 photo provided by the Newtown Bee shows Dawn Lafferty Hochsprung, principal at Sandy Hook Elementary School, in Newtown, Conn. (AP Photo/Eliza Hallabeck) MANDATORY CREDIT: NEWTOWN BEE,

In this handout image provided by ABC News, shows Nancy J. Lanza mother of suspected mass shooter Adam Lanza at an unspecified time and place. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo courtesy of Family of Nancy Lanza/ABC News via Getty Images)