How would you phrase the sentence?

I came around a corner to see the mysterious man dragging a body out of a room down the hall. I quickly entered an office and closed the door. I then opened the door and looked out to see the man disappearing into the room (again). Moments later he returned/came back out, dragging out/along another body.

Hi teachers. Two questions:

1. Would it be correct to add "again"?

2. How would you phrase the last sentence?