There is a video showing the police taking a rifle with wooden trim, looked like a wooden stock, out of the car's trunk. It was not used unless it was used by someone else.
I don't have the link. Maybe do a search at youtube.

As you probably know, Lanza's father was testifying about financial and tax fraud within GE, military industrial complex.
.......and Holmes father was testifying against the Fed, and others.

Lanza's mother also was in a sensitive with a big corporation, maybe seen as a spy with her husband spewing, or maybe she was collecting evidence.

Both of these young men looked more than drugged. They do look hypnotized, and they could remain so until someone accidently drops the word or sound that wakes them up.