• A woman comforts a young girl during a vigil service for victims of the Sandy Hook Elementary shooting, Friday, Dec. 14, 2012, at St. Rose of Lima Roman Catholic Church in Newtown, Conn. (AP Photo/Andrew Gombert, Pool)

NEWTOWN, Conn. (AP) — All the victims of the Connecticut elementary school shooting were killed up close by multiple rifle shots, a medical examiner said.

Dr. H. Wayne Carver said at a news conference Saturday the deaths are classified as homicides. He said he believes “everybody was hit more than once.”

“This is a very devastating set of injuries,” Carver said.

Friday’s massacre of 26 children and adults at the school elicited horror and soul-searching around the world even as it raised more basic questions about why the gunman, a 20-year-old described as brilliant but remote, was driven to such a crime and how he chose his victims.

Investigators were trying to learn more about Adam Lanza and questioned his older brother, who was not believed to have been involved in the rampage at Sandy Hook Elementary. Police shed no light on the motive for the second-deadliest school shooting in U.S. history.

In tight-knit Newtown on Friday night, hundreds of people packed St. Rose of Lima Church and stood outside in a vigil for the 28 dead — 20 children and six adults at the school, the gunman’s mother at home, and the gunman himself, who committed suicide. People held hands, lit candles and sang “Silent Night.”

“These 20 children were just beautiful, beautiful children,” Monsignor Robert Weiss said. “These 20 children lit up this community better than all these Christmas lights we have. … There are a lot brighter stars up there tonight because of these kids.”

Lanza is believed to have suffered from a personality disorder and lived with his mother, said a law enforcement official who was briefed on the investigation. Authorities said he had no criminal history.

Outdated photo of Adam Lanza

Asked at a news conference whether Lanza had left any emails or other writings that might explain the rampage, state police Lt. Paul Vance said investigators had found “very good evidence” and hoped it would answer questions about the gunman’s motives. Vance would not elaborate.

However, another law enforcement official, speaking on condition of anonymity, said that investigators have found no note or manifesto of the sort they have come to expect after murderous rampages.

The tragedy plunged the picturesque New England town of 27,000 people into mourning.

“People in my neighborhood are feeling guilty about it being Christmas. They are taking down decorations,” said Jeannie Pasacreta, a psychologist who volunteered her services and was advising parents struggling with how to talk to their children.

Lanza shot his mother, Nancy Lanza, drove to the school in her car with at least three of her guns, and opened fire in two classrooms around 9:30 a.m. Friday, authorities said.

A custodian ran through the halls, warning of a gunman, and someone switched on the intercom, perhaps saving many lives by letting them hear the chaos in the school office, according to a teacher. Teachers locked their doors and ordered children to huddle in a corner, duck under their desks or hide in closets as shots reverberated through the building.

Among those killed was the school’s well-liked principal, Dawn Hochsprung. Town officials said she died while lunging at the gunman in an attempt to overtake him. A woman who worked at the school was wounded.

Maryann Jacob, a clerk in the school library, was in there with 18 fourth-graders when they heard a commotion and gunfire outside the room. She had the youngsters crawl into a storage room, and they locked the door and barricaded it with a file cabinet. There happened to be materials for coloring, “so we set them up with paper and crayons.”

After what she guessed was about an hour, officers came to the door and knocked, but those inside couldn’t be sure it was the police.

“One of them slid his badge under the door, and they called and said, ‘It’s OK, it’s the police,'” she said.

The district superintendent said she was told another teacher pushed students in the kiln room until police let them out.

Investigators believe Lanza attended the school several years ago but appeared to have no recent connection to it, a law enforcement official speaking on condition of anonymity said. It was not clear whether he held a job.

At least one parent said Lanza’s mother was a substitute teacher at the school. But her name did not appear on a staff list. And the official said investigators were unable to establish any connection so far between her and the school.

The law enforcement officials insisted on anonymity because they were not authorized to discuss the unfolding investigation.

Lanza’s older brother, 24-year-old Ryan Lanza, of Hoboken, N.J., was questioned, and investigators searched his computers and phone records, but he told law enforcement he had not been in touch with his brother since about 2010.

For about two hours late Friday and early Saturday, clergy members and emergency vehicles moved steadily to and from the school. The state medical examiner’s office said bodies of the victims would be taken there for autopsies.

The gunman forced his way into the kindergarten-through-fourth-grade school, authorities said. He took three guns into the school — a Glock and a Sig Sauer, both semiautomatic pistols, and a .223-caliber Bushmaster rifle, according to an official who spoke on the condition of anonymity. The weapons were registered to his slain mother.

Lanza and his mother lived in a well-to-do part of prosperous Newtown, about 60 miles northeast of New York City, where neighbors are doctors or hold white-collar positions at companies such as General Electric, Pepsi and IBM.

His parents filed for divorce in 2008, according to court records. His father, Peter Lanza, lives in Stamford, Conn., and works as a tax director for GE.

The gunman’s aunt Marsha Lanza, of Crystal Lake, Ill., said her nephew was raised by kind, nurturing parents who would not have hesitated to seek mental help for him if he needed it.

“Nancy wasn’t one to deny reality,” Marsha Lanza said, adding her husband had seen Adam as recently as June and recalled nothing out of the ordinary.

Catherine Urso, of Newtown, said her college-age son knew the killer. “He just said he was very thin, very remote and was one of the goths,” she said.

Lanza attended Newtown High School, and several news clippings from recent years mention his name among the honor roll students.

Joshua Milas, who graduated from Newtown High in 2009 and belonged to the school technology club with him, said that Lanza was generally a happy person but that he hadn’t seen him in a few years.

“We would hang out, and he was a good kid. He was smart,” Joshua Milas said. “He was probably one of the smartest kids I know. He was probably a genius.”

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Click here to view victim photos and a list of those who lost their life

Click here to view a disturbing twitter account created by an internet troll pretending to be Adam Lanza

Who is Adam Lanza? Why did he take so many lives?

Here’s a report posted by The Atlantic Wire:

Adam Lanza was 20 years old before he died on Friday — ABC, which first posted the photo above, is reporting that he took his own life after taking those of 20 children, six adults, and his mother. His brother Ryan, who was mistakenly identified as the shooter, hadn’t seen him since 2010, Ryan told authorities, according to The New York Post. According to the Associated Press, Ryan described his younger brother to authorities as “somewhat autistic” and said he suffered from a personality disorder. People with autism sometimes display “behaviors beyond their control,” according to this med-help.org site. Though there is not much research on the connection between violent crimes and autism,one study found 15 percent of juveniles evaluated in a “forensic setting” in Sweden had autistic spectrum disorders. (Asperger’s is a form of autism but is no longer listed in the DSM-5; click here for more on the latest research.) Another law enforcement official told Fox that Adam Lanza had a “checkered past … troubled youth for most of his life,” but CNN is reporting that he had no criminal record.

Click here to view the rest of the report