Heartbroken town begins burials

NEW: Lanza visited at least one gun range with his mother, an ATF spokeswoman says NEW: Young children are among those packing the funeral of 6-year-old Jack Pinto in Newtown Authorities look at smashed computer parts from the gunman's home, an official says "These tragedies must end. And to end them, we must change," President Obama says

Watch CNN's LIVE TV coverage of the Connecticut elementary school shooting as the story continues to unfold. People are sharing their concern and sadness about the Newtown school shooting. What are your thoughts? Share them with CNN iReport.

(CNN) -- As relatives began to say goodbye, forever, to their slain children, investigators in Connecticut worked Monday to better understand what happened to them, including digging deeper into the gun and computer use of the 20-year-old man who ended their lives.

In recent days, authorities have established that Adam Lanza shot open an entrance into Newtown's Sandy Hook Elementary School. He fired multiple magazines -- each one with 30 bullets -- from a Bushmaster AR-15 rifle to kill six adults and 20 children from two classrooms. Each victim was shot multiple times before Lanza used a handgun to kill himself.

Why? Authorities haven't given a motive. They are looking into bits and pieces of the shooter's home computer, a law enforcement official said Monday.

The hope is that searching the smashed computer -- including e-mails Lanza may have sent and websites he may have visited -- will shed light on his thinking before Friday's shooting, according to the official.

Authorities are also investigating Lanza's history with firearms. The three weapons found near his dead body were the semiautomatic .223-caliber rifle made by Bushmaster and two handguns made by Glock and Sig Sauer. A shotgun was found in Lanza's car, according to Connecticut State Police Lt. J. Paul Vance.

The weapons belonged to his mother, Nancy Lanza, who was found shot dead in her Newtown home on Friday. She was a firearms collector who shot them and went to gun ranges, Bureau of Alcohol, Tobacco, Firearms and Explosives spokeswoman Debora Seifert said Monday.

The two -- the mother and the son who presumably killed her -- even went to a gun range together. From what the ATF has been able to determine thus far, "their most recent visit was more than six months ago," Seifert said.

Beyond these developments, officials overall were tight-lipped Monday about the details of their investigation. Hundreds of state troopers, detectives and other law enforcement personnel on the case were analyzing every round of ammunition from every weapon, probing the gunman's medical history and interviewing witnesses, said Vance, the state police spokesman.

Investigators plan to interview the two adults wounded "in their lower extremities" in the shooting. The hope is that the two -- whom authorities have not identified, though a parent last week said one was a vice principal at the school -- could play a key role in helping to reconstruct what happened "when it's medically appropriate," said Vance.

"I'm not at liberty to discuss any of the information so far uncovered, but suffice it to say ... we will cover every single facet," the police spokesman said of the investigation.

First funerals and understanding 'the unthinkable'

The anguish caused by the shooter was visible Monday outside a Newtown funeral home in the pained faces of young and old who paid their respects to 6-year-old Jack Pinto.

Jack was an avid sports fan -- one of his idols, New York Giants receiver Victor Cruz, paid tribute by writing "Jack Pinto My Hero" on his cleats during his NFL game Sunday -- and an aspiring wrestler. Shortly before his death, he had his first match and earned a medal, said New Milford Youth Wrestling Association President Ken Linder.

Many of his teammates said goodbye to Jack, wearing medals to his funeral. Others, many of them about his age, came in Newtown youth sports shirts. The funeral home couldn't contain the mourners, with the line extending to the street.

Jack wasn't the only one remembered Monday. So, too, was Noah Pozner, another 6-year-old whose family said he could get what he wanted just by batting his long eyelashes.

Noah loved playing with his siblings, especially his twin sister. They still don't know how their brother died, Noah's aunt said.

"How do you tell them that's how their brother died?" Victoria Haller asked. "It's the unthinkable, really."

The heartbreaking ritual of sending off Newtown's victims began Monday and will continue for days.

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Investigators found nothing to substantiate the reported threat, a police official said, declining to provide additional details. The church held Sunday services following last week's mass shooting at Sandy Hook Elementary School in Newtown. Connecticut State Police officers walk out of St. Rose of Lima Roman Catholic Church after the Newtown church received a threat December 16. Firefighters attach black bunting to a fire truck as a memorial at the fire station down the street from the Sandy Hook Elementary School in Newtown, Connecticut, on Saturday, December 15. Connecticut Chief Medical Examiner H. Wayne Carver II talks to the media about the elementary school shooting during a press conference at Treadwell Memorial Park on December 15. Zulma Sein is hugged by a family member outside of the entrance to the Sandy Hook School on Saturday. Police officers keep guard at the entrance to the street leading to the Sandy Hook Elementary School on Saturday, December 15. Connecticut State Police Lt. Paul Vance addresses the press on December 15. Police officers stand at the entrance to the street leading to the Sandy Hook Elementary School on December 15. Corinne McLaughlin, a student at the University of Hartford, bows her head during a candlelight vigil at Hartford, Connecticut's Bushnell Park on Friday, December 14, honoring the students and teachers who died at Sandy Hook Elementary School in nearby Newtown earlier in the day. Distraught people leave the fire station after hearing news of their loved ones from officials on Friday. Emergency workers stand in front of the Sandy Hook Elementary School in Newtown. A child and her mother leave a staging area outside Sandy Hook Elementary School in Newtown, Connecticut, on December 14. Members of the media converge on December 14 in front of an apartment at 1313 Grand Street in Hoboken, New Jersey. The apartment is believed to be connected to the Connecticut elementary school shooting. Faisal Ali, right, of Colorado Springs, Colorado, joins other people outside the White House on December 14 to participate in a candlelight vigil to remember the victims of the Sandy Hook Elementary School shooting. Connecticut State Police spokesman Lt. J. Paul Vance, center, briefs the media on the elementary school shootings during a press conference at Treadwell Memorial Park on December 14 in Newtown. People weep and embrace near Sandy Hook Elementary School on Friday, December 14. A woman leans on a man as she weeps near Sandy Hook Elementary School on December 14. President Barack Obama wipes a tear as he speaks about the shooting at Sandy Hook Elementary School during a press briefing at the White House on December 14. A woman weeps near the site of a shooting at Sandy Hook Elementary School on December 14. A woman weeps near Sandy Hook Elementary School on December 14. People comfort each other near Sandy Hook Elementary School on December 14. A man takes in the scene near Sandy Hook Elementary School on December 14. A young girl is given a blanket after being evacuated from Sandy Hook Elementary School on December 14. State police personnel lead children from the school. Children wait outside Sandy Hook Elementary School in Newtown, Connecticut, after the shooting. A boy weeps at Reed Intermediate School after getting news of the shooting at Sandy Hook Elementary School on December 14. FBI SWAT team members walk along Dickinson Drive near Sandy Hook Elementary School on December 14. An aerial view of Sandy Hook Elementary School in Newtown, Connecticut on December 14. Connecticut State Troopers arrive on the scene outside Sandy Hook Elementary School on December 14. A Connecticut State Police officer runs with a shotgun at the Sandy Hook Elementary School in Newtown on December 14. Police patrol the streets around Sandy Hook Elementary School on December 14. People try to deal with the shock of the attack outside Sandy Hook Elementary School on December 14. Connecticut State Police secure the scene of the shooting on December 14. People embrace outside Sandy Hook Elementary School on December 14. A man escorts his son away from Sandy Hook Elementary School on December 14. People take in the news outside Sandy Hook Elementary School on December 14. People line up to enter Newtown Methodist Church near the the scene of the shooting on December 14. A woman speaks with a Connecticut state trooper outside Sandy Hook Elementary School on December 14. The streets around Sandy Hook Elementary are packed with first responders and other vehicles. A view of the scene at Sandy Hook Elementary School after the shooting. A young boy is comforted outside Sandy Hook Elementary School on December 14. People embrace each other on December 14. Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting Connecticut school shooting HIDE CAPTION << < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 > >> Photos: Connecticut school shooting Official hopes shooting spurs change Seeking comfort in faith

Jessica Rekos on Tuesday. Benjamin Wheeler on Thursday. Madeleine Hsu, Friday. All of them 6 years old.

Once all the funerals end, residents say it's unlikely their tight-knit community will ever be the same.

"It's incomprehensible, the pain here," Darla Henggeler said. "You can't imagine. We're still in shock. I can't let my heart go there because it's so overwhelming.

"Once it settles in, I think my heart will break."

What's next for Sandy Hook's students

It's possible no one will ever know why Adam Lanza killed his mother in their home before taking her guns and massacring little children, none of them older than seven.

Citing school authorities in Newtown, Vance said Monday, "There was no connection between the shooter and the school."

But one mother told CNN Monday that Lanza once attended Sandy Hook Elementary. Cynthia Jaroszewksi said that he was in the same first- and third-grade classes with her daughter, Rebecca.

There was no class Monday for Sandy Hook students and faculty who survived Friday's shooting. Newtown Police Lt. George Sinko said classes are suspended "until further notice."

Moving trucks could be seen outside the school Monday, taking supplies and equipment from Sandy Hook to vacant Chalk Hill Elementary School in neighboring Monroe, Connecticut.

Authorities have said students from Sandy Hook will eventually resume their studies at Chalk. Gov. Dannel Malloy said that he's signed an order to remove bureaucratic hurdles and allow the two school systems to partner.

Read more: Timeline: School violence in the U.S.

Read more: Support crucial for kids after trauma

Obama: "These tragedies must end"

Meanwhile, the mass shooting has reinvigorated the debate about gun control, with President Barack Obama's call for change the centerpiece of his address Sunday night to mourners in Newtown High School's packed auditorium

"In the coming weeks, I will use whatever power this office holds to engage my fellow citizens -- from law enforcement to mental health professionals, to parents and educators -- in an effort aimed at preventing more tragedies like this," he said.

Read more: "We can't tolerate this anymore," Obama says

Interactive: Remembering the school shooting victims

The president didn't mention specific steps he would take, but he said the country has failed to do everything it can to protect youths from such immense tragedy.

Can we honestly say we're doing enough to keep our children -- all of them -- safe from harm?President Barack Obama

"Can we honestly say we're doing enough to keep our children -- all of them -- safe from harm?" he said, adding that "if we don't get that right, we don't get anything right."

"If we're honest with ourselves, the answer is no."

Obama said it was the fourth time he's seen a community torn apart by a mass shooting during his presidency: Tucson, Arizona; Aurora, Colorado; Oak Creek, Wisconsin; and now, Newtown.

"These tragedies must end," he said. "And to end them, we must change."

Read more: Hugs, tears can comfort survivors

Read the full text of the president's speech

Analysis: Why gun controls are off the agenda in America

Timeline: School violence in U.S.

Shooting sparks reactions nationwide

The tragic shooting has touched nerves nationwide, with some holding vigils and building makeshift memorials to support the victims and others calling for political action.

Participants in a candlelight vigil in New York City passed around a petition calling for greater gun control, Joe Josephs told CNN's iReport.

John Licata told CNN's iReport that the need for better vetting before people buy guns is clear, and authorities need to take things a step further.

"We have to get our public officials to do something about this," he said. "One of those issues is banning assault weapons. ... I am a believer in the Second Amendment, but there has to be a ban."

Others said more guns were needed.

Jameson Riley told CNN's iReport that the shooting shows the need for more armed guards in schools. Riley, a gun owner, said that the recent mass shootings have made him consider getting a concealed weapon permit.

"I would absolutely carry a concealed weapon. I have a 2-year-old daughter, and she is the light of my life. And I would like to protect her," he said. "It is horrible to think that we have come to a path where this is necessary, but I think it is fixable."