AmmoManAaron
Master
One thing I read, but didn't find substantiation for, was that they started a room-to-room search on the 29th floor before going to the 32nd, where they knew the guy was. Haven't gotten clarity on that part of the timeline.
Supposedly they were clearing the floors below and above the shooter to protect any nearby non-combatants. Makes a little sense, but not a whole lot...even when considering the explosive dynamic entry on the room. LVMPD SWAT is well-versed in explosive dynamic entry, so I really don't see that being a big issue.