Also, I said the witnesses could tell which direction the shot came from. Which in the first place is what I was commenting about your post 8 of this thread. I did not say that the witnesses saw the shooter.
My eyesight is currently 20/30 (tested last week). A hundred yards is only 300 feet. I shoot paper at 100 yards in low light (dawn/dusk) with open sights and have no problem with seeing the target. At 100 yards, I could see whether it was a man or women, what color and type of clothes were worn, approximate height, and probably make a probable racial identification. I would not be able to give a facial description. I would not be able to identify anything except the number of occupants in a vehicle and an identificatiion of the make model and, probably, year of a vehicle. There is a bus stop a little over a hundred yards from my kitchen window. I just went to it and very easily made similar (actually better)observations. The weather here is dark and overcast today. I understand that most of the shots were less than a hundred yards, so I would expect multiple witnesses to make similar observations if they could pinpoint the source of the shot.