[Oni]

I'm in the village where you first enter and I killed so many Las Plagas wannabes that I got the cut scene where they all run away into that building and yell "Lord something"... I honestly don't want to run into Dr. Salvador (oh, yes... I've heard many stories about this chainsaw wielding madman...) but I don't know any easy ways to kill him when I don't have the shotgun yet. Can anyone help?