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CT Shooter Adam Lanza

Learned How to Fire Guns

... From His Mom

12/16/2012 12:55 AM PST BY TMZ STAFF
breaking news

1216_adam_lanza_mom_abcMass murderer Adam Lanza learned everything he knew about firearms ... from his mother.

Adam's mom, Nancy Lanza -- who was Adam's first victim -- was an avid gun collector who reportedly bragged to friends and neighbors about her weapons and took her son to several firing ranges to teach him how to shoot ... in the months leading up to his deadly assault.

One of Nancy's neighbors, Dan Holmes, told the NY Post ... Nancy was a gun enthusiast ... an avid collector ... often taking her kids to the gun range, infusing them with her obsession with firearms.

Adam used several different guns when he opened fire on Sandy Hook Elementary school earlier this week ... all of which were registered to his mother.

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