NEWTOWN, Conn. - Authorities in Newtown, Connecticut, put together more pieces of the puzzle Saturday to explain exactly what happened inside Sandy Hook Elementary School, one day after a gunman opened fire there, killing 20 students and six adults.
View Gallery: Sandy Hook Elementary school shooting
View Gallery: Community copes with aftermath of school shooting
View Gallery: Deadliest school shootings in U.S. history
President Barack Obama will travel to the town on Sunday to meet with the families of the victims of the shooting, the White House said Saturday.
All of the victims died from gunshot wounds and all were struck more than once, according to H. Wayne Carver II, chief medical examiner for the state of Connecticut. Their deaths have been classified as homicides.
"I've been at this for a third of a century. My sensibilities may not be the average man, but this probably is the worst I have seen or the worst that I know of any of my colleagues having seen," Carver told reporters.
He performed seven of the autopsies himself. Carver said the wounds he knew about were caused by a "long weapon." Asked by a reporter whether a rife was the primary weapon, he responded, 'Yes."
Of the children killed, all were either 6 or 7 years old -- 12 girls and eight boys. The adults ranged in ages from 27 to 56, and included the school's principal, psychologist and at least two teachers.
State police released the victims' names and ages Saturday afternoon.
The victims were identified as:
- Charlotte Bacon, 6
- Daniel Barden, 7
- Rachel Davino, 29
- Olivia Engel, 6
- Josephine Gay, 7
- Ana Marquez-Greene, 6
- Dylan Hockley, 6
- Dawn Hocksprung, 47
- Madeline Hsu, 6
- Catherine Hubbard, 6
- Chase Kowalski, 7
- Jesse Lewis, 6
- James Mattioli, 6
- Grace McDonnell, 7
- Anne Marie Murphy, 52
- Emilie Parker, 6
- Jack Pinto, 6
- Noah Pozner, 6
- Caroline Previdi, 6
- Jessica Rekos, 6
- Avielle Richman, 6
- Lauren Russeau, 30
- Mary Sherlach, 56
- Victoria Soto, 27
- Benjamin Wheeler, 6
- Allison Wyatt, 6
They were killed before the shooter apparently turned the gun on himself, ending the second-deadliest school shooting in U.S. history.
Searching for answers, major crime investigators from the Connecticut state police were combing "every crack and crevice" of the school.
They said they're finding some "very good evidence" there, and at the home of the man identified by authorities as the shooter -- 20-year-old Adam Lanza. Lanza's mother was killed at that house before the school rampage began, authorities said.
"The detectives will certainly analyze everything and put a complete picture together of the evidence that they did obtain, and we're hopeful -- we're hopeful -- that it will paint a complete picture as to how and why this entire unfortunate incidence occurred," said Lt. J. Paul Vance, a spokesman for the Connecticut State Police.
Vance said police are already talking to the one wounded adult at the school, a woman who has not been named.
"She has been treated and she'll be instrumental in this investigation, as I'm sure you can understand," he said.
Lanza was found dead next to three guns, a semi-automatic .223-caliber Bushmaster rifle and two pistols made by Glock and Sig Sauer, a law enforcement source told CNN. All belonged to his mother.
Nancy Lanza was a gun collector and recently showed off a newly bought rifle to fellow Newtown resident Dan Holmes, who owns a landscaping business in the town.
Adam Lanza also had access to at least three more guns, a second law enforcement source said. Investigators recovered a .45-caliber Henry Repeating Rifle, a .22-caliber Marlin Rifle and a .30-caliber Enfield Rifle, though it's unclear where they were found, the source said.
Among the dead are Dawn Hochsprung, the school's beloved principal, and school psychologist Mary Sherlach.
Based on CNN's contacts with friends and family members, CNN was able to identify two other adults killed at the school: Vicki Soto, a first-grade teacher, and substitute teacher Lauren Rousseau.
Vance said Saturday that Lanza forced his way into the school, though he wouldn't say how or whether Lanza used weapons to do it.
Authorities said it's also not clear whether Lanza entered before or after 9:30 a.m., the time each day when the school would lock its doors as part of a security system introduced this year. Authorities say the first emergency call about the shooting came in at "approximately" 9:30 a.m. Friday.
Within minutes, 26 people had been killed with chilling efficiency, leaving only the one wounded survivor, according to Vance.
"Stuff like this does not happen in Newtown," said Renee Burn, a teacher at another school in the town, which is roughly 60 miles northeast of New York City.
Until Friday, only one homicide in the past 10 years had been reported in the upscale community of expansive homes surrounded by woods, where many residents commute to jobs in Manhattan and the nearby Connecticut cities of Stamford and Hartford.
With the death toll at 26, the massacre in Newtown is the second-deadliest school shooting in U.S. history, behind the 2007 Virginia Tech mass shooting that left 32 dead.
Flags were lowered to half-staff in a number of states, and vigils were held at houses of worship and at schools amid a national outpouring of grief.
Two law enforcement sources said Adam Lanza lived with his mother. Contrary to early reports, they said, Nancy Lanza was not a teacher at Sandy Hook Elementary.
Investigators believe Lanza killed his mother and then took her guns and made his way to the elementary school wearing black fatigues and a military vest, according to a law enforcement official.
At about 9:30 a.m., as announcements were read over the loudspeaker to the nearly 700 students, the first shots rang out.
Students described being ushered into bathrooms and closets by teachers after hearing the first shots.
It sounded like "pops, gunshots," Janet Vollmer, a kindergarten teacher, said.
Vollmer locked her classroom doors, covered the windows and moved her 19 pupils toward the back of the room.
"We're going over in a safe area," she told the 5-year-olds. Then, she opened a book and started to read.
Outside Vollmer's classroom, a gunman was moving through the hallway of the one-story building.
In the first few minutes, the gunman is believed to have shot the principal, Hochsprung, and the school's psychologist, Sherlach.
One parent who was at the school in a meeting with Hochsprung, Sherlach and the vice principal said she heard a "pop, pop, pop." All three left the room and went into the hall to see what was happening. The parent ducked under the table and called 911.
"I cowered," she told CNN. The gunman "must have shot a hundred rounds."
Inside her classroom, Vollmer was still reading to the children when police officers banged on the locked door.
The kindergartners were told to line up and cover their eyes as they were led by police past bodies, presumably of their fellow schoolmates, Vollmer said.
As reports of the shooting made their way around town, frantic parents descended on a nearby firehouse where the children had been taken.
"Why? Why?" one woman wailed as she walked up a wooded roadway leading from the school.
At Kimbrough Elementary School in Grant Hill on Saturday, San Diego Police's Central Division held their 24th annual Santa's Village Toy Distribution festival.
Hundreds of kids showed up to see Santa and were thrilled to get presents handed to them. What they talked about was surprising.
"He went to the school and killed the mother," said 5-year-old Marco Santilli. He said he did not want Santa to give presents to people like that in hopes that no more children would have to die.
In an email sent to families with students in the San Diego Unified School District, Superintendent Bill Kowba said:
"The tragic and senseless shooting today at Sandy Hook Elementary School in Newtown, Connecticut has shocked and saddened all of us. We join in the national outpouring of grief and offer our deepest condolences to the families of the victims. No words can express our feelings about this horrific tragedy.
The safety of the children who attend schools is always the highest priority of every employee at every school in our country. But sadly, we live in a world where senseless acts of violence occur all too frequently. Today's shooting transcends our ability to understand how anyone could commit such an act on innocent children, teachers and caretakers.
All San Diego Unified schools have safety plans that cover all contingencies. We are continually reviewing those plans and training our staff to ensure the safety of our students. We also have the expertise of our own school police department who monitor the safety of our school campuses. Our school police and our school staff will have a heightened awareness of security issues during this time.
Our school counselors and crisis response teams will be available to our Principals to provide guidance during the coming days to support the emotional needs of our students. Counseling professionals recommend that parents encourage their children to talk about their thoughts and feelings related to this incident and to reassure children of their own health and safety. It is also recommended that parents limit children's television viewing, since this tragedy will receive extensive media coverage.
Unfortunately in our society, there are no absolute safe havens from senseless acts of violence. But our schools are safe environments where our students grow and learn each school day under the care and guidance of dedicated and caring teachers and school staff. I want to assure our parents and the community that we will continue to protect our students and give them a sense of safety and well-being at our schools as we all cope to understand the tragedy in Connecticut."
Police at Santa's Village told 10News on Saturday they already work very closely with schools. They have officers designated to ensure student safety and do plan to increase their visibility on local campuses.