Several photos of Adam Lanza, accused Newtown, Conn., school shooter, have emerged, along with information about the troubled youth's past.
Adam Lanza was spending more time alone in the months leading up to the mass shooting as his mother, Nancy Lanza, encouraged him to be independent.
He suffered from mental disabilities, a joint Hartford Courant/Frontline investigation reports in a new documentary, entitled "Raising Adam Lanza."
The Lanza documentary airs Tuesday night on PBS. In it reporters from the Courant attempt to retrace the steps taken by Nancy and Adam in recent years.
What they found complicates the picture that has occasionally appeared in the media of Nancy as a gun obsessed mother who was in denial about her son.
Adam is believed to have shot his mother four times in the head as she slept on December 14 before shooting his way into Sandy Hook Elementary.
There, he killed 20 children, six women and himself.
Sandy Hook conspiracy theories aside, all evidence points to the fact that Lanza acted alone. The question is why, and if anyone could've seen it coming.
The 20-year-old had been spending more time alone in his mother's home in the affluent Connecticut suburb in the months leading up the shooting.
Adam's social world began shrinking after he left Newtown High School at age 16 to enroll in a nearby college, where he made As and Bs before withdrawing.
Since 2010, Adam had not attended school.
Between 2010 and 2012, Nancy took Adam to gun ranges to practice shooting. She purchased four firearms, including one used in the attack, during that period.
Friends say Nancy used that as a way to bond with a withdrawn son. Police also found thousands of dollars worth of violent video games in the Lanzas' home.
Police believe Adam may have been inspired by the video games, since he changed the magazines of his weapons more frequently than was necessary.
Adam may have been "competing" with Norwegian mass murderer Anders Breivik, based on news articles about Breivik's 2011 crime they found in the home.
Continue reading what Frontline's investigation unearthed ...