Officers recovered a 9mm assault rifle, various realistic air guns, explosive black powder and four hand grenades, one of which was active.More here: http://www.philly.com/philly/news/breaking/10453397.html
Authorities said the teen had been constructing the three inactive grenades in order to make them operational.
Books on how to make explosives, videos of the Columbine shooting and notebooks full of plans, and details of violent acts were also recovered from the teen's home.
Montgomery County District Attorney Bruce Castor said the 14-year-old youth, who had a 9mm semi-automatic rifle purchased by his mother, did not have any ammunition for the weapon.
Castor said the youth had attended Plymouth schools until 18 months ago, when his parents started home-schooling him because he was being bullied by other students.
The mother may also be charged, he said. The mother legally purchased the gun at a gun show, specifically for her son, said Castor. The gun has a laser sight.
Now there's the real story, if you ask me. A kid bullied in the public school system is so angry and bitter that even after 18 months of being home schooled he's still plotting his revenge.
This wouldn't have happened IMO if the parents had started home schooling him earlier, before the problem got so bad -- as long as they're decent parents and he's not fundamentally unhinged to start with.