Assault rifle was main weapon; all children killed were 6 or 7 years old.

PITTSBURGH (KDKA) –Officials are still trying to piece together a motive for the shooter who killed 26 children and adults at a Newtown, Conn. elementary school.

CBS News reports that the gunman, 20-year-old Adam Lanza, was described as brilliant but remote.

It was initially reported that two guns were found inside the school, a Sig Sauer and Glock; and later police said there was also a third gun, an assault rifle, found at the scene.

However, as of Saturday morning, CBS News says that a fourth weapon was found in his car and that “a few” other weapons were found as Lanza’s mother’s house.

The three guns found in the school were all registered to Lanza’s mother, but authorities are still checking the registries for the other guns.

During a press conference Saturday, Connecticut Chief Medical Examiner Dr. H. Wayne Carver II said that the assault rifle was the main weapon used in Friday’s shooting and that each victim was hit multiple times.

All of the children killed were 6 and 7 years old, according to the Associated Press.

The Associated Press also reports that federal authorities are checking to see if Lanza trained in any way for his attack on Sandy Hook Elementary School at local gun ranges, or if he was a part of any recreational gun communities.

Authorities say they have found no connections so far.

Bureau of Alcohol, Tobacco and Firearms spokeswoman Ginger Colbrun said the ATF was tracking the guns found at Lanza’s mother’s house, according to the Associated Press.

Connecticut State Police spokesman Lt. Paul Vance also told CBS News that all of the bodies have now been removed from the school, which is still considered a crime scene.

Authorities did take Lanza’s older brother, 24-year-old Ryan, into custody after the shooting.

The older Lanza brother was first thought to be the shooter in the event, but sources say shooter Adam Lanza may have stolen Ryan’s identification.

Ryan Lanza in not believed to have been a part of the shooting, CBS News says.

But Lt. Vance told the media Saturday morning that lots of evidence recovered at the scene of the shooting and Lanza’s mother’s home would help paint a more complete picture of the motive for the massacre.

Meanwhile, the elementary school’s principal, Dawn Hochsprung, who was among those killed by Lanza, is being hailed as a hero after reports of her noble efforts to try to stop the shooter.

The Associated Press reports that Hochsprung was killed as she lunged toward Lanza in an effort to stop him.

It also reports that Newtown Council Chairman Jeff Capeci said “From what we know, it’s hard to classify her as anything else.”

(TM and © Copyright 2011 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2011 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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