Well, this is an interesting bit from Digby…

Investigators have a theory that Adam Lanza’s interest in Norwegian mass murderer Anders Behring Breivik might have led to the Dec. 14 massacre that left 20 children and six adults dead at Sandy Hook Elementary School in Newtown, Conn.

The theory is based in part on several news articles about Breivik that investigators found in Lanza’s bedroom at the Newtown home where he lived with his mother, Nancy Lanza, according to law enforcement sources familiar with the investigation.
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CBS News reported Monday that Lanza saw himself as being in competition with Breivik and chose Sandy Hook Elementary because it was the “easiest target.”