The man suspected of gunning down more than two dozen people in a small town in Connecticut is the son of a teacher at the elementary school where the killings occurred, and his mother is presumed to be among the dead.
Police say Adam Lanza apparently drove to his mother's school carrying two handguns and a .223-caliber rifle and carried out the massacre. Law enforcement officials are trying to learn as much as possible about the 20-year-old and questioning his older brother, who is not believed to have any involvement in the rampage.
So far, authorities have not spoken publicly of any possible motive.
Several neighbors of the Lanzas in Sandy Hook, a community about 60 miles northeast of New York City, said they knew little about the family.