Normally they can't see through glass but with the windows shot out you would think it would be one of the first things they did before a breach. They should have been able to hover waaaaay out and get a pretty decent view of the interior before the breach. After all they did have over an hour of chaos before they finally got around to entering the room.

If they do have footage they might even be able to see his body and it's temp.

Not to mention they'd probably want to inspect nearby rooftops for any other shooters. LVMPD should have had a FLIR camera in the field that night and I want to know where the footage is.