Adam Lanza Identified as Gunman in Connecticut Shooting

By Stephen M. Silverman

12/14/2012 at 05:30 PM EST

Woman speaking with state police at the scene

Cloe Poisson/Hartford Courant/MCT/Getty

As authorities continue to investigate Friday's horrific shooting at Sandy Hook Elementary School in Newtown, Conn., details are beginning to emerge about the alleged gunman.

A law enforcement official tells the Associated Press that the shooter has been identified as 20-year-old Adam Lanza, the son of a teacher at Sandy Hook Elementary School, which is a K-4 school.

A second law enforcement official says the man's mother, Nancy Lanza, was a kindergarten teacher and is presumed dead.

Although Lanza wasn't named during a Friday afternoon press conference, Connecticut State Police spokesman Lt. Paul Vance told reporters, "The shooter is deceased inside the building."

Vance put the death toll at 28 total: 20 children, six adults, the gunman and a deceased adult at a secondary location.

There are reports that the deceased adult at a secondary location was a family member found in the Lanza family home in Newtown. No further details are available.

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According to reports, the alleged shooter, armed with three weapons and wearing a bullet-proof vest, entered the grade school Friday morning. He reportedly began shooting in the principal's office, then went to the kindergarten class, where he opened fire.