From left, Town of Ridgefield, Conn., Det. Durling, and Town of Greenwich, Conn., Officer Rivera stand near a memorial in Newtown, Conn. Tuesday, Dec. 25, 2012. Regional police agencies arrived in Newtown to relieve the local police force for the Christmas holiday. (AP Photo/Craig Ruttle)

Photo by: Craig Ruttle

From left, Town of Ridgefield, Conn., Det. Durling, and Town of Greenwich, Conn., Officer Rivera stand near a memorial in Newtown, Conn. Tuesday, Dec. 25, 2012. Regional police agencies arrived in Newtown to relieve the local police force for the Christmas holiday. (AP Photo/Craig Ruttle)