Look behind the guy I believe it's a stroboscoop (that's how we call those lights here)
When I look closely to the taxidrivers recording I see that the light flickers way before, and even after shots are fired.

However the shots that start at 0.45sec. in the recording make me think there is a second shooter. But then again it could be that it are shots from the other window around the "corner" and that that is why they sound far away, not sure yet. I've never been in gunfire. I only can analyse with my musician ears.
I have made half of an analysis which I may be posting later. Don't know jet

Thanks for posting this.