FBI details Sandy Hook shooter Adam Lanza's life in unsealed docs

Newly-unsealed FBI documents reveal fresh details on the life of Sandy Hook gunman Adam Lanza — including a visit to the home he shared with his mother by federal agents after he hacked into a government computer.

"The authorities told her that if her son was that smart, he could have a job with them someday," according to one of the heavily-redacted reports released without warning Tuesday.

MAP: Mass Shootings Since Sandy Hook

Lanza, at that point in the ninth grade, landed on investigator's radar after hacking his way into an unidentified agency's computer. The teen made it through two levels of security before his efforts were thwarted, the documents showed.

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We Remember Sandy Hook - Newtown, Connecticut
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NEWTOWN, CT - DECEMBER 15: Mourners react at a makeshift memorial near the school following the mass shooting at Sandy Hook Elementary School on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Mario Tama/Getty Images)

National Cathedral, with the Newtown Foundation holds a vigil in memory of the Newtown shooting victims on December, 12, 2013 in Washington, DC. family members of gun victims hold candles in vigil during the closing hymn.

Photo: Bill O'Leary/The Washington Post via Getty Images

Carole King performs during the Washington National Cathedral's National Vigil for Victims of Gun Violence. The event was to mark the one year anniversary of the shooting.

Photo: Matt McClain, Pool/Getty Images

The World Children's Choir performs during The National Vigil for Victims of Gun Violence in D.C. The vigil is in remembrance of victims of gun violence as the first anniversary of the Sandy Hook Elementary School shooting.

Photo: PAUL J. RICHARDS/AFP/Getty Images

Lindsay Knauf takes a picture of a bus bearing some of the over 6,000 names of people killed by gun violence since the massacre in Newtown at a remembrance event on the six month anniversary of the massacre at Sandy Hook Elementary School. A a 26-second moment of silence was observed to honor the 20 children and six adults who were killed at the school. The event also included the reading of the names of over 6,000 people who have been killed by gun violence. The reading of names is expected to take 12 hours.

Photo: Spencer Platt/Getty Images

Cecilia Floros, 10, of Newtown, attends a remembrance event on the six month anniversary of the massacre at Sandy Hook Elementary School on June 14, 2013 in Newtown, Connecticut.

Photo: Spencer Platt/Getty Images

Players for the Boston Cannons wear decals on their helmets to remember people whose lives were changed at the Sandy Hook and Boston Bombing attacks during a Major League Lacrosse game against the New York Lizards at James M. Shuart Stadium on April 28, 2013 in Hempstead, New York.

Photo: Paul Bereswill/Getty Images

Paul Rabil, number 99 on the Boston Cannons, walks onto the field with a young fan from Newtown, Connecticut before a game with the New York Lizards at Harvard Stadium on June 21, 2013 in Boston, Massachusetts.

Photo: Jim Rogash/Getty Images

A memorial to victims of last year's Sandy Hook elementary school victims is seen in front of a house in Newtown, Connecticut, on December 13, 2013.

Photo: EMMANUEL DUNAND/AFP/Getty Images

U.S. Vice President Joe Biden leads a meeting on extending access to mental health care at the White House with Katy Sherlach, Georgetown Graduate student, Bill Sherlach, founder of Mary's Fund and Newtown victim family member, and Jeremy Richman, founder and CEO of Avielle Foundation and Newtown victim family member, on December 10, 2013 in Washington, D.C. During the meeting Biden announced that an additional $100 million will be made available to bolster access to mental health services and improve mental health facilities across the nation.

Photo: Win McNamee/Getty Images

Michele Gay, Josephine's mother, holding a specially made Bevin bell, checks out the newly unveiled sign dedicated to her daughter, Josephine, at the new playground opening ceremony, Dec. 11, 2013, in Bridgeport, Conn., the latest playground in the Sandy Ground project.

Photo: Stephen Dunn/Hartford Courant/MCT via Getty Images

Police say man in Herndon found with stolen #sandyhook memorial signs. Andrew Truelove facing charges. @wusa9 http://t.co/ChMlkU69xV

At an opening ceremony for the Sandy Ground Project playground in honor of Josephine Gay, children raced inside the tent-covered playground.

Photo: Stephen Dunn/Hartford Courant/MCT via Getty Images

Nancy Hintze, of Newtown, Conn., slides down a slide with her baby as children watch at a dedication ceremony for Emilie's Shady Spot playground at Riverside Park in New London, Conn., November 17, 2013. The playground, dedicated and named for Emilie Parker, is the 14th of 26 to be built.

Photo: Cloe Poisson/Hartford Courant/MCT via Getty Images

A fireworks display at sunset lit up the sky over Long Island Sound after the new playground opening ceremony, Dec. 11, 2013, in Bridgeport, Conn., the latest playground in the Sandy Ground Project.

Photo: Stephen Dunn/Hartford Courant/MCT via Getty Images

Mark and Jackie Barden package rubber bracelets in memory of their slain son, Daniel Barden in Newtown, CT on May 23, 2013. Daniel was among the school children killed in Newtown last December. A family member suggested the rubber bracelets and a Facebook page be started to remember Daniel. The theme, 'What Would Daniel Do?' (WWDD) to inspire people to share their kindness with others, just like Daniel did.

Photo: Linda Davidson / The Washington Post via Getty Images

Violinists from the Mozart Academy, Queens College, and Manhattan, Diller Quaile, and Bloomingdale schools of music perform on stage during the Newtown Memorial Concert at Gerald W. Lynch Theatre on May 6, 2013 in New York City.

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The Newtown Youth Choir perform the national anthem prior to a game between the New York Yankees and the Baltimore Orioles at Yankee Stadium on July 7, 2013 in the Bronx borough of New York City.

Photo: Jim McIsaac/Getty Images

Toronto Blue Jays players observe a moment of silence in honor of the shooting victims in Newtown, Connecticut before the start of MLB game action on Opening Day against the Cleveland Indians on April 2, 2013 at Rogers Centre in Canada.

Photo: Tom Szczerbowski/Getty Images

Newtown volunteer firefighter Peter Barresi got a tattoo to remember the Sandy Hook Elementary School tragedy. His son, Wyatt, is a first-grader at Sandy Hook School, and two boys in his Cub Scout Den were killed in the massacre. The tattoo will serve as a reminder to Barresi who said he never wants to forget what happened that horrible day.

Photo: Cloe Poisson/Hartford Courant/MCT via Getty Images

A group of 26 riders biked from Newtown, CT to Washington, D.C. for a rally in support of gun control legislation. At a stop in College Park, MD they were joined by 3 riders from a team honoring the Virginia Tech shooting victims. Rider Wayne Prescott teaches at a high school near Newtown. He emerges from a support car after getting some dry provisions before continuing the ride. 

Photo: Michael S. Williamson/The Washington Post via Getty Images

Monte Frank, of Newtown, Connecticut, speaks at a press conference with Congress members from Connecticut and a group of 26 cyclists who rode from Newtown in support of common-sense solutions to gun violence on March 12, 2013 in Washington, D.C. Each member of the group of cyclists, which included two parents of children who attended Sandy Hook Elementary School, rode in honor of one of the 26 victims killed at the school on December 14, 2012.

Photo: T.J. Kirkpatrick/Getty Images

James Maslow, Kendall Schmidt, Logan Henderson and Carlos Pena Jr. of Nickelodeon's Big Time Rush perform during their free concert for families on July 22, 2013 in Newtown, Connecticut.

Photo: Michael Loccisano/Getty Images for Nickelodeon

A man identifing himself as Jonathan Lanza, the uncle of shooter Adam Lanza, stops by a memorial to pay his respects to the 27 people including 20 children killed in the Sandy Hook Elementary School shooting. (Photo by Craig Warga/NY Daily News via Getty Images)
NEWTOWN, CT - DECEMBER 16: A woman becomes overwhelmed with emotion as she approaches a makeshift memorial at the Saint Rose of Lima Catholic Church in Newtown on Dec. 16, 2012, two days after gunman Adam Lanza walked into Sandy Hook Elementary School in Newtown, Conn. and opened fire killing 20 children and several adults on. This church will be handling eight of the funerals. (Photo by Essdras M Suarez/The Boston Globe via Getty Images)
Sign reading 'Pray for Newtown' is hung above interstate following shooting at Sandy Hook Elementary school where Adam Lanza opened fire inside school killing 27 people, including 20 children. (Photo by Howard Simmons/NY Daily News via Getty Images)
STRATFORD, CT - DECEMBER 15: Donna Soto (R), mother of Victoria Soto, the first-grade teacher at Sandy Hook Elementary School who was shot and killed while protecting her students, leans on her son Matthew while mourning their loss at a candlelight vigil in honor of Victoria at Stratford High School on December 15, 2012 in Stratford, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Jared Wickerham/Getty Images)
NEWTOWN, CT - DECEMBER 15: (L to R) Lucas, Kelly and Michael DaSilva embrace at a makeshift memorial near the school following the mass shooting at Sandy Hook Elementary School on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Mario Tama/Getty Images)
NEWTOWN, CT - DECEMBER 15: State Police spokesman Lt. J. Paul Vance briefs the media and answers questions about the elementary school shooting before releasing the names of the victims during a press conference at Treadwell Memorial Park on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Jared Wickerham/Getty Images)
NEWTOWN, CT - DECEMBER 15: Connecticut Chief Medical Examiner H. Wayne Carver II talks to the media and answers questions the media about the elementary school shooting during a press conference at Treadwell Memorial Park on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Jared Wickerham/Getty Images)
NEWTOWN, CT - DECEMBER 15: Claudia Urbiana and daughter Jocelyne Cardenas (left) hug outside of the entrance to the Sandy Hook School on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)
Megan (no last name available), a classmate of Adam Lanza from kindergarten until 7th grade, talks to reporters near the home of Nancy Lanza, mother of Adam Lanza, on December 15, 2012 in Newtown, Connecticut. Adam Lanza, 20, was identified by authorities as the black-clad killer who fatally shot his mother in her home, gunned down 26 children and adults at Sandy Hook Elementary School, and then committed suicide on December 14. AFP PHOTO/DON EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
NEWTOWN, CT - DECEMBER 15: Police officers stand outside of the entrance to the Sandy Hook Elementary School on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)
NEWTOWN, CT - DECEMBER 15: Newtown resident Molly Villodas, 12 years old, speaks to the media about the violence at the Sandy Hook School on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)
NEWTOWN, CT - DECEMBER 14: Mourners gather inside the St. Rose of Lima Roman Catholic Church at a vigil service for victims of the Sandy Hook School shooting December 14, 2012 in Newtown, Connecticut. Twenty-seven people are dead, including 20 children, after a gunman identified as Adam Lanza in news reports opened fire in the school. Lanza also reportedly died at the scene. (Photo by Andrew Gombert-Pool/Getty Images)
NEWTOWN, CT - DECEMBER 14: People gather at a fire station that was set up as a triage area near the scene of a mass school shooting at Sandy Hook Elementary School on December 14, 2012 in Newtown, Connecticut. There are 27 dead, 20 of them children, after Adam Lanza reportedly opened fire in one of the largest school massacres in U.S. history. Lanza is dead at the scene and his mother, a teacher at the school, is also dead. (Photo by Mario Tama/Getty Images)
NEWTOWN, CT - DECEMBER 14: Responders gather at the scene of a mass school shooting at Sandy Hook Elementary School on December 14, 2012 in Newtown, Connecticut. There are 27 dead, 20 of them children, after Adam Lanza reportedly opened fire in one of the largest school massacres in U.S. history. Lanza is dead at the scene and his mother, a teacher at the school, is also dead. (Photo by Mario Tama/Getty Images)
HOBOKEN, NJ - DECEMBER 14: Ryan Lanza, the brother of the identified shooter Adam Lanza, is escorted to a car by law enforcement for questioning in connection with an elementary school shooting on December 14, 2012 in Hoboken, New Jersey. According to reports, there are 27 dead, including 20 children, after the gunman opened fire in at the Sandy Hook Elementary School in Newtown, Connecticut. Adam Lanza was also found dead at the scene. (Photo by Michael Bocchieri/Getty Images)
HOBOKEN, NJ - DECEMBER 14: An unmarked police car transports a man from 1313 Grand St. work a scene near 1313 Grand St., which is believed to be connected with an elementary school shooting on December 14, 2012 in Hoboken, New Jersey. According to reports, there are 27 dead, including 20 children, after a gunman identified as Adam Lanza, opened fire in at the Sandy Hook Elementary School in Newtown, Connecticut. The shooter, identified as Adam Lanza was also found dead at the scene. (Photo by Michael Bocchieri/Getty Images)
NEWTOWN, CT - DECEMBER 14: People stand on Dickson Street near the scene of an elementary school shooting on December 14, 2012 in Newtown, Connecticut. Twenty-seven are dead, including 20 children, after a gunman identified as Adam Lanza in news reports, opened fire in at the Sandy Hook Elementary School in Newtown. Lanza also reportedly died at the scene. (Photo by Douglas Healey/Getty Images)
NEWTOWN, CT - DECEMBER 14: Connecticut Gov. Dan Malloy and Lt. Gov. Nancy Wyman brief the media on the elementary school shootings during a press conference at Treadwell Memorial Park on December 14, 2012 in Newtown, Connecticut. Twenty-seven are dead, including 20 children, after a gunman identified as Adam Lanza in news reports, opened fire in Sandy Hook Elementary School in Newtown. Lanza also reportedly died at the scene. (Photo by Jared Wickerham/Getty Images)
NEWTOWN, CT - DECEMBER 14: People hug outside of the Newtown United Methodist Church on December 14, 2012 in Newtown, Connecticut. Twenty-seven are dead, including 20 children, after a gunman identified as Adam Lanza in news reports, opened fire in the Sandy Hook School in Newtown. Lanza also reportedly died at the scene. (Photo by Jared Wickerham/Getty Images)
NEWTOWN, CT - DECEMBER 15: A police officer stands outside of the entrance to the Sandy Hook School on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)
NEWTOWN, CT - DECEMBER 15: A woman reacts at a prayer service to reflect on the violence at Sandy Hook Elementary School at St. John Episcopal Church on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Mario Tama/Getty Images)
NEWTOWN, CT - DECEMBER 15: Newtown High School students Trevor Lopez (left) Steven Tramontozzi (center) and Chris Koch stand outside of a church where residents have come to pray and reflect on the violence at the Sandy Hook Elementary School on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)
Girls kneel during candle light vigil following shooting at Sandy Hook Elementary school where Adam Lanza opened fire inside school killing 27 people, including 20 children. (Photo by Howard Simmons/NY Daily News via Getty Images)
NEWTOWN, CT - DECEMBER 15: A message along the highway speaks to the grief of the Sandy Hook community near the Sandy Hook Elementary School on December 15, 2012 in Newtown, Connecticut. Twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza was found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)
NEWTOWN, CT - DECEMBER 16: Kristen Brassard (Left) and Kat Donohue, both of Newtown, hug outside of the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)
NEWTOWN, CT - DECEMBER 16: Connecticut State Police officers walk outside St. Rose of Lima Roman Catholic Church after a threat to the church was received during the first day of Sunday services following the mass shooting at Sandy Hook Elementary School on December 16, 2012 in Newtown, Connecticut. The church was evacuated during noon mass due to the unspecified threat and will remain closed the rest of the day. Police have reportedly now given the 'all clear' for the area. On Friday, December 14, twenty six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire in the school. Lanza also reportedly had committed suicide at the scene. (Photo by Mario Tama/Getty Images)
Twelve-year-old Samantha and her father Len Strocchia, neighbors of Nancy Lanza, mother of Adam Lanza, talk to reporters on December 15, 2012 in Sandy Hook, Connecticut. Lanza, 20, was identified by authorities as the black-clad killer who fatally shot his mother in her home, gunned down 26 children and adults at Sandy Hook Elementary School, and then committed suicide on December 14. AFP PHOTO/DON EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
NEWTOWN, CT - DECEMBER 16: People walk to lay flowers in front of the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)
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"Nancy had to convince the authorities that her son was just very intelligent and was challenging himself to see if he could hack (his way in)," the report said of Lanza’s mother.

The 1,500-page release further detailed how Lanza, 20, withdrew almost totally from the world in the three months before he descended on the Sandy Hook Elementary School and killed 26 innocents — 20 first-grade students and a half-dozen employees.

 

Neighbors reported seeing nothing unusual in the Lanza home on Yogananda St. in the days before the rampage. But Lanza became a shut-in before he headed to the school, spending three months in his home with little, if any, connection with the outside world.

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Sandy Hook school shooter, Adam Lanza
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Sandy Hook school shooter, Adam Lanza
Adam Lanza is pictured in this undated handout photo courtesy of Western Connecticut State University. The father of the gunman who killed 26 people at a Newtown, Connecticut, school in 2012, said he wished his son had never been born, the New Yorker magazine reported on March 10, 2014. Speaking publicly for the first time, Peter Lanza, father of shooter Adam Lanza, said: "You can't get any more evil. How much do I beat up on myself about the fact that he's my son? A lot." REUTERS/Western Connecticut State University/Handout via Reuters (UNITED STATES - Tags: CRIME LAW) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS
The house where Adam Lanza lived with his mother Nancy Lanza is seen in Newtown, Connecticut December 14, 2014. Parents of almost half the young children killed by gunman Adam Lanza at an elementary school in Newtown, Connecticut, two years ago on Sunday have taken initial steps toward filing lawsuits tied to one of the deadliest school shootings in U.S. history. For a second straight year the leafy suburb has planned no public events to commemorate the massacre, which left 20 first graders and six educators dead at Sandy Hook Elementary School, an incident that inflamed the U.S. debate over gun control. REUTERS/Adrees Latif (UNITED STATES - Tags: CRIME LAW ANNIVERSARY)
NEWTOWN, CT - DECEMBER 19: Police tape stretches across the front yard of the Lanza residence on December 19, 2012 in Newtown, Connecticut. Adam Lanza reportedly shot his mother Nancy Lanza last Friday before he killed 26 others, including 20 children, at Sandy Hook Elementary School. (Photo by John Moore/Getty Images)
NEWTOWN, CT - 2005: Adam Lanza is pictured in this undated image from 2005 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Kateleen Foy/Getty Images)
Weapons and ammunitions belonging to Sandy Hook Elementary school gunman Adam Lanza in Newtown, Connecticut are seen after its recovery at the school in this police evidence photo released by the state's attorney's office November 25, 2013. A long-awaited state's attorney report on Monday on one of the worst mass shootings in the United States revealed few new details and left relatives of 20 children and six adults killed with no more knowledge about Lanza's motive. REUTERS/Connecticut Department of Justice/Handout via Reuters (UNITED STATES - Tags: CRIME LAW) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS
A Sig Sauer pistol belonging to Sandy Hook Elementary school gunman Adam Lanza in Newtown, Connecticut is seen after its recovery at the school in this police evidence photo released by the state's attorney's office November 25, 2013. A long-awaited state's attorney report on Monday on one of the worst mass shootings in the United States revealed few new details and left relatives of 20 children and six adults killed with no more knowledge about Lanza's motive. REUTERS/Connecticut Department of Justice/Handout via Reuters (UNITED STATES - Tags: CRIME LAW) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS
A photo of Sandy Hook Elementary school gunman Adam Lanza is seen in his bedroom in Newtown, Connecticut in this police evidence photo released by the state's attorney's office November 25, 2013. A long-awaited state's attorney report on Monday on one of the worst mass shootings in the United States revealed few new details and left relatives of 20 children and six adults killed with no more knowledge about Lanza's motive. REUTERS/Connecticut Department of Justice/Handout via Reuters (UNITED STATES - Tags: CRIME LAW) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS
The bedroom of Sandy Hook Elementary school gunman Adam Lanza in Newtown, Connecticut is seen in this police evidence photo released by the state's attorney's office November 25, 2013. A long-awaited state's attorney report on Monday on one of the worst mass shootings in the United States revealed few new details and left relatives of 20 children and six adults killed with no more knowledge about Lanza's motive. REUTERS/Connecticut Department of Justice/Handout via Reuters (UNITED STATES - Tags: CRIME LAW) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS
NEWTOWN, CT - 2005: Adam Lanza is pictured in this undated image from 2005 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Kateleen Foy/Getty Images)
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His mother was banned from entering his room and documents recounted his lack of connection to society: No friends, no associates, no girlfriend — not even any interest in social media. Lanza focused instead on Japanese techno music and video games like "Super Mario Brothers."

 

The only job that Lanza ever held was at a computer repair company. And though his mother was a doting parent who provided her son with everything, Lanza killed her inside their suburban home before heading to his old grammar school.

One neighbor did tell the FBI that Nancy Lanza was a gun nut who "loved the feeling and power of a gun in her hand."

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