Connecticut School Shooting

Gary Seri, general manager at the Stone River Grille, prepares to hang a message written on a table cloth in honor of the teachers who died along with students a day earlier when a gunman open fire at Sandy Hook Elementary School, Saturday, Dec. 15, 2012, in the Sandy Hook village of Newtown, Conn. Seri said the teachers were scheduled to have their holiday party at his restaurant. The massacre of 26 children and adults at Sandy Hook Elementary school elicited horror and soul-searching around the world even as it raised more basic questions about why the gunman, 20-year-old Adam Lanza, would have been driven to such a crime and how he chose his victims. (AP Photo/Julio Cortez / December 17, 2012)

Connecticut Education Commissioner Stefan Pryor said state construction employees are advising on renovating Sandy Hook, which serves grades kindergarten through four.

It wasn't just Newtown that was concerned about the next steps for its schoolchildren. Across the country, vigilance was high. In an effort to ensure student safety and calm parents' nerves, districts asked police departments to increase patrols and have sent messages to parents outlining safety plans they assured them are regularly reviewed and rehearsed.

Teachers girded themselves to be strong for their students and for questions and fears they would face in the classroom.

"It's going to be a tough day," said Richard Cantlupe, an American history teacher at Westglades Middle School in Parkland, Fla. "This was like our 9/11 for schoolteachers."

Communities were on edge. In nearby Ridgefield, Conn., schools were locked down after a suspicious person was seen near train station.

Authorities say the gunman shot his mother, Nancy Lanza, at their home and then took her car and several of her guns to the school, where he broke in and shot his victims to death, then himself. A Connecticut official said the mother was found dead in her pajamas in bed, shot four times in the head with a .22-caliber rifle.

During his later rampage, terrified staffers at the school stayed hidden for hours, not knowing how many shooters there were.

Divorce paperwork released Monday showed that Nancy Lanza had the authority to make all decisions regarding Adam's upbringing. The divorce was finalized in September 2009, when Adam Lanza was 17.

Federal agents have concluded that Lanza visited an area shooting range, but they do not know whether he actually practiced shooting there. Ginger Colbrun, a spokeswoman for the federal Bureau of Alcohol, Tobacco, Firearms and Explosives, would not identify the range or say how recently he was there.

Agents determined Lanza's mother visited shooting ranges several times, but it's not clear whether she took her son or whether he fired a weapon there, Colbrun said.

A law enforcement official, speaking on condition of anonymity, said investigators are reviewing the contents of Lanza's computer, as well as phone and credit card records, in an effort to piece together his activities leading up to the shooting. The official was not authorized to discuss the details of the case.

Lanza took classes at Western Connecticut State University when he was 16, and earned a B average, said Paul Steinmetz, spokesman for the school in Danbury. He said Monday that Lanza took his last class in the summer of 2009 and didn't return.

Investigators have offered no motive, and police have found no letters or diaries that could shed light on it. They believe Lanza attended Sandy Hook many years ago, but they couldn't explain why he went there Friday. Authorities said Lanza had no criminal history, and it was not clear whether he had a job.

Lanza is believed to have used a Bushmaster AR-15 rifle in the school attack, a civilian version of the military's M-16 and a model commonly seen at marksmanship competitions. It's similar to the weapon used in a recent shopping mall shooting in Oregon.

Versions of the AR-15 were outlawed in the United States under the 1994 assault weapons ban. That law expired in 2004, and Congress, in a nod to the political clout of the gun-rights lobby, did not renew it.

In some of the first regulatory proposals to rise out of the Newtown shooting, Democratic lawmakers and independent Sen. Joe Lieberman said Sunday that military-style assault weapons should be banned and that a national commission should be established to examine mass shootings.

"Assault weapons were developed for the U.S. military, not commercial gun manufacturers," said Lieberman, of Connecticut, who is retiring next month. "This is a moment to start a very serious national conversation about violence in our society, particularly about these acts of mass violence."

Gun rights activists remained largely quiet, all but one declining to appear on the Sunday talk shows. In an interview on "Fox News Sunday," Rep. Louie Gohmert, a Texas Republican, defended the sale of assault weapons and said that the principal at Sandy Hook, who authorities say died trying to overtake the shooter, should herself have been armed.

Contributing to this report were Associated Press writers John Christoffersen, Ben Feller, Adam Geller, Jim Kuhnhenn and Michael Melia in Newtown; David Collins in Hartford, Conn.; Brian Skoloff in Phoenix; and Anne Flaherty in Washington.
   
Copyright 2012 The Associated Press.