The fact that BRW is in pretty much the same position in both photographs is a very strong indicator the pics were taken seconds, and not minutes, apart.Is that too obvious?
Where's Harold Norman in the Powell photo?....
He can't be seen because of the angle the photo has been taken at.
Or maybe Norman has not been drawn to the window by the sound of gunshots in the Powell phot but he is alerted in the Dillard photo.
Maybe, but the point is that BRW's position in both pics strongly indicates there was only a matter of seconds between the two pics.