No assault weapon used at Sandy Hook?

First reports of any incident tend to have errors. Later reports should be more accurate, and may contradict the first ones. That’s a natural way that news is assembled, corrected and distributed.

So early reports should be taken tentatively until confirmed or refuted.

Unfortunately, some people feel that the first reports are somehow most accurate, and later changes must be because the government, the Illuminati, or Sinister Dark Forces in Black Helicopters got to the reporters and forced them to revise the story away from the truth.

So whenever two reports differ, the one that is least likely to be true will often be the one believed, evidence and common sense be damned.