Report: Adam Lanza Was Obsessed with Columbine Shooting

But investigators couldn't find evidence he intended his own assault

A report on the Newtown school shooting says that the gunman had an obsession with mass murders but that investigators did not discover any evidence he had indicated to others an intention to carry out such a crime.

The summary of the investigation by Connecticut State's Attorney Stephen Sedensky says Adam Lanza was obsessed in particular with the April 1999 shootings at Columbine High School in Colorado.