Sen. Dianne Feinstein, D-Calif., introduced her assault weapons ban amendment this morning, warning her Senate colleagues that universal background checks would not have prevented the Sandy Hook massacre.

“We know one thing, none of this information would have been caught on a background check,” Feinstein insisted. “And I say that, although I support background checks.”

Feinstein added that the Sandy Hook shooter, Adam Lanza, received his assault weapons as a gift from his mother, and that their home was a “veritable weapons depot.”

Feinstein displayed a poster of the weapons used during the Newtown shooting, demanding a ban on assault weapons.

"Mr. President, I'm sure background checks will stop many would-be murderers but they would have not prevented Newtown," Feinstein said flatly. "The weapons were legally purchased by his mother and while he was disturbed, he had no criminal record or record of mental illness and would not have been subject to a background check because his mother gave him these weapons."