The shooting lasted no more than 15 minutes.
11 minutes per LVSD.
10:08 it started.
Room breached 11:20.
He was dead — they say — when they came in but we see spent bullet casings on top of the blood on the floor in the death photo.
Seems like more than 15 minutes to me....
http://www.foxnews.com/us/2017/10/03/las-vegas-shooting-timeline-events.html