Investigators are trying to piece together details of Friday's shooting spree at an elementary school in the US state of Connecticut, which killed 20 children and eight others.
Connecticut State Police Spokesman Paul Vance said detectives are still scouring Sandy Hook Elementary School, accumulating evidence and information.
Vance added that the process could take another day or two, if not longer.
"We've done everything we need to do to literally peel back the onion, layer by layer, and examine every crack and crevice of that facility and that does not .... exclude .... the outside of the building. The outside of the building is also part of the crime scene, eve
