@HealthRanger Well, on the plus side that does jive with what audio analysis indicates about Crooks.

A test needs to be conducted. Find a similar building with a metal roof, set a micriphone up on the ground at a gable end, lay down flat on the roof away from any edge and about 4ft from the ridge and fire an AR-15 5.56 16" barrel a few times while recording the audio. Now standup and do the same thing while still recording audio.

I have a theory. I think that when Crooks saw Trump go down, he thought he had succeeded, so he stood up and fired indiscriminately, perhaps in the direction of the North Barn snipers. Because the gun was now raised a few feet above the roof, the sound could radiate toward the ground rather than all being reflected skyward by the roof. That may be why the next 4 shots sound much less muffled. At this point the local sniper team dropped him with a head shot, if not then how do you explain Crooks just sitting there for ten seconds while the South Barn SSCS snipers got their gun repositioned and fired the supposed kill shot. Crooks should've kept firing (30 round mag? Not full?) until out of bullets or he should've run. Perhaps he fiddled with his remote detonater for 10 seconds? His cessation of fire is compatible with the supposition that he was terminated by shot #8 IMO. Either that or his gun jammed, he ran out of bullets or he voluntarily stopped. He knew that the cops knew where he was and would soon find their way onto the roof!