** FILE ** A school bus rolls toward a memorial in Newtown, Conn., for victims of the Sandy Hook Elementary School shooting on Tuesday, Dec. 18, 2012. (AP Photo/Charles Krupa)
Joanne and Bill Brunetti of Newtown, Conn., part of a group monitoring memorials around the clock, take an early morning shift on Dec. 25, 2012, in Newtown, near a memorial for Sandy Hook Elementary School students and teachers. Gunman Adam Lanza walked into the school on Dec. 14 and opened fire, killing 26, including 20 children, before killing himself. (Associated Press)
Stockings and angel silhouettes honoring Sandy Hook Elementary School students and teachers line an iron fence in Newtown, Conn., Tuesday, Dec. 25, 2012. People continue to visit memorials after gunman Adam Lanza walked into Sandy Hook Elementary School in Newtown, and opened fire, killing 26, including 20 children, before killing himself. (AP Photo/Craig Ruttle)
** FILE ** Addison Strychalsky, 2, of Newtown, Conn., pets Libby, a golden retriever therapy dog, during a visit from the dogs and their handlers to a memorial for the Sandy Hook Elementary School shooting victims on Tuesday, Dec. 18, 2012. (AP Photo/David Goldman)
Teachers walk away from the Sandy Hook Elementary School following the mass shooting on Friday, Dec. 14, 2012, in Newtown, Conn. (AP Photo/The Journal News, Frank Becerra Jr.)
Parents walk away from the Sandy Hook Elementary School with their children following the mass shooting on Friday, Dec. 14, 2012, in Newtown, Conn. (AP Photo/The Journal News, Frank Becerra Jr.)
** FILE ** A woman weeps as she arrives to pick up her children at the Sandy Hook Elementary School on Friday, Dec. 14, 2012, in Newtown, Conn. (AP Photo/The Journal News, Frank Becerra Jr.)
Heavily armed Connecticut state troopers are on the scene at the Sandy Hook Elementary School following the mass shooting on Friday, Dec. 14, 2012, in Newtown, Conn. (AP Photo/The Journal News, Frank Becerra Jr.)
A woman waits to hear about her sister, a teacher, following a shooting at the Sandy Hook Elementary School in Newtown, Conn., about 60 miles northeast of New York, on Friday, Dec. 14, 2012. (AP Photo/Jessica Hill)
Authorities say Adam Lanza killed his mother at their home and then opened fire inside the Sandy Hook Elementary School in Newtown, Conn., killing 26 people, including 20 children, before taking his own life, on Friday, Dec. 14, 2012. (AP Photo/NBC News)
Firefighters salute as a hearse passes for the funeral procession to the burial of 7-year-old Sandy Hook Elementary School shooting victim Daniel Gerard Barden, Wednesday, Dec. 19, 2012, in Newtown, Conn. Barden was killed when Adam Lanza walked into Sandy Hook Elementary School in Newtown, Conn., Dec. 14, and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/David Goldman)
A Newtown resident who identified himself only as Andrew, holds roses as he visits a memorial for the Sandy Hook Elementary School shooting victims, Tuesday, Dec. 18, 2012, in Newtown, Conn. (AP Photo/David Goldman)
A Newtown resident who identified himself only as Andrew, holds roses as he visits a memorial for the Sandy Hook Elementary School shooting victims, Tuesday, Dec. 18, 2012, in Newtown, Conn. (AP Photo/David Goldman)