It looks that way; after the shooting in Fredericksburg, in which the victim survived, the first stories said LE didn't think it was the same weapon -- they were wrong. The weapon didn't change, but something else did.
And just because a weapon DOES change, it doesn't mean a thing in this scenario.
I'm still not discounting the fisherman that was shot either as I assume he was in an obscure area (and they might have come upon him). This is a no witness operation.
Sac