Or heavily layered security which prevents even a small group of internal people from doing something like this (which would also prevent this kind of scenario).
This almost has to be an inside job. I can't imagine a rando would know a plain Jane looking building like that would have 30 million in it even with armored trucks parked there. Retail is so credit card heavy this must have been piling up a while.
Got dang! I wish I could steal 30 million dollars! It's crazy that they went in through the roof. Back when I worked construction it occurred to me how effective it would be to just sawsall my way through a roof if I ever wanted to burglarize anything. But I wasn't connected enough to know of any buildings with $30M in them.
This heist beat even the notorious Lufthansa heist, shown in the Goodfellas movie, which was the largest heist of all time for a very long time. Adjusted for inflation, that heist was worth $27.6M.