"She would often go target shooting with her kids:" Nancy Lanza, mother of "murderer" Adam Lanza was "avid gun…

PICTURED: The mother of massacre gunman Adam Lanza who taught son how to shoot before he went on killing rampage Nancy Lanza, 52, was killed by her son, Adam Lanza, before he massacred 26 people and killed himself at Sandy Hook Elementary in ConnecticutNancy Lanza once showed off a 'high-end rifle' to family friend Dan Holmes and recalled 'she was proud of it… she loved her guns' The mother had five guns registered to her name, two of which Adam Lanza used to carry out the execution-style killingsA third gun belonging to Nancy Lanza was found in the back of the car that Adam Lanza drove to Sandy Hook Elementary Peers remember Adam Lanza as a quiet and extremely intelligent student who kept to himself and carried black briefcase to class Brother Ryan, 24, an accountant at Ernst and Young, said Adam had personality disorder Reporters broke the news of the massacre to Adam's father, Peter, who is divorced from the mother and lives in Stamford, Connecticut with new wife | UPDATED: 20:43 GMT, 15 December 2012 Adam Lanza, a troubled 20-year-old loner with a history of autistic behavior, is the monster behind a horrific shooting at a Connecticut elementary school Nancy Lanza took her son, Adam, to a shooting range and taught him how to use a firearm before he turned a gun on her and shot her dead, then executed more than two dozen terrified children and teachers at an elementary school.