I thought this was "curious":

"....Dan Holmes, who owns a local landscaping business, said Nancy Lanza was a gun collector, and that she showed off a rifle she had recently purchased.

"She told me she'd go target shooting with her boys pretty often," Holmes said.

But ATF Special Assistant Agent Gene Marquez said his agency "has not been able to uncover any evidence that the mother and the son were actively engaged in going to the gun ranges, practicing marksmanship, or anything of that nature."

[link to www.cnn.com]