Police found a large assortment of weapons in the home of Adam Lanza, the young man who murdered 20 first graders and six teachers at a school in Newtown, Connecticut in December.  And newly released papers say the young killer was able to fire 155 bullet in five minutes, using semiautomatic weapons with extended clips.

On Thursday, authorities unsealed the search warrants for the first time since the Sandy Hook Elementary School Massacre.  The inventory includes rifles, knives and samurai swords; damaged computer equipment; journals and drawings; a newspaper clip of the Valentine’s Day Murders at Northern Illinois University four and a half years earlier; and a report card from the time Adam Lanza attended Sandy Hook School.

The contents of Lanza’s personal journals or the nature of the drawings was not disclosed.

Previously published reports noted that investigators had found news articles about the Norwegian mass murderer Anders Behring Breivik, who killed 77 people in two attacks in July 2011, most of them teenagers who were attending a summer camp.

Before going to the school on the day of the massacre, the first thing Lanza did was to kill his mother in her bed in the home.  Her National Rifle Association certificate was also in the items seized.  Lanza killed himself when police closed in.

His motives and mindset are a mystery.  Sources described him as a shut-in who played violent video games day in and day out.