he was shooting from two windows, the sound was echoing all over the place. I don’t think the windows open.
There is a taxi driver who videod with her cell phone starting pretty soon after the shooting started. If you listen to the first couple of minutes you will hear a string of about 15 shots, very loud, overhead. Then you hear that string echo off two different buildings. Then there is a long pause, almost a minute, and then another, longer burst from much farther away but louder than the echos and while that burst is going there is a new burst, very loud overhead.
I am not implying anything but the recording is there. It goes on for another 15 minutes but she drives away at about the 5 minute mark.