Not sure of the exact day but I heard Vance state on TV before of after the ME that all were shot with the AR type weapon.The ME confirmed,dont know where the confusion come s from?
There was one NBC report right after the event (which originated with the local affiliate) that the Bushmaster was in the trunk and he used handguns for the shootings. This was retracted. That report was repeated a bit by other sources.
Then that NBC report was ressurected by a collection of conspiracy morons last week and posted all over the internet, with an even larger number of even stupider people not noticing that the NBC report was from mid-December and spreading it further.
That's how we got to where we are today.
I saw that interview and later in it after he said all were shot with the AR he was asked if he had examined all the bodies and he said no.