THE ex-convict turned sniper who lured two firefighters to their deaths by setting his house on fire was armed with three weapons, one of them an assault rifle similar to that used in the Sandy Hook school massacre earlier this month.
And he wanted to make sure that his goodbye note was legible, typing out his desire to "do what I like doing best, killing people", police said.
Charred remains found in the home were thought to be those of his sister.
Police said 62-year-old William Spengler brought plenty of ammunition for three weapons, including a military-style assault rifle, as he set out to burn down his upstate New York neighbourhood just before sunrise on Christmas Eve. The rifle was the same make and calibre weapon used in the Connecticut school shooting.
When firefighters arrived, Spengler unleashed a torrent of bullets, shattering the windshield of the fire truck that volunteer firefighter and police Lt Michael Chiapperini (43) was driving. His fellow firefighter Tomasz Kaczowka (19) was killed as well.
Spengler killed himself as seven houses burned. His body was found on a nearby beach.