Originally Posted by shoops
But if that's the case then his sister would have already rolled down the stairs, and it says she went downstairs after he shot his mom. So I think it's still his mom he shot first.
The guy is not a stenographer retelling the story from a fact sheet. His sister was probably shot on the stairs, I mean look at the size of his house. Those stairs can go for days. So then she gets up or crawls all the way down the stairs, I mean it's not rocket science. He popped her and she fell, and he went downstairs without knowing her exact coordinates. Later, she reappeared. Seems pretty simple to follow.