If the mall employees had used a defib, and gotten less than perfect results, you know these folks would have sued them for that. Short of having had a board certified ER physician on-scene, there is no way the mall could have avoided being invited to the families litigation lottery short of not responding at all.
The difib is not a magic machine. It doesn't work like on TV, where you just shock 'em back to life. It's slightly better than nothing, but not much.
This father's belief that his daughter would be alive if only the mall had been quicker to respond with the defib is not based in reality. Five units in a place as big as a shopping mall means you are talking about a ten minute response time, even if everything goes perfectly.
I know it sounds harsh, but shocking that girl after 10 minutes down was not going to make much of a difference.
Sorry, I don't think its unreasonable that if you have an AED on site, that when you have a person go down with no pulse, to use it. That's like arguing, yea I had the reach pole that could reach the drowning person, but hey, I didn't use it... but not my problem right?
She may have died anyway, but certainly what you have here is a case of UNTRAINED STAFF.
I will tell you this much, had it been my kid, I'd sue too, so that someone elses kid does not get treatment available because the mall management company was too damned inept or cheap to train their staff property. I'd do it to make sure that no one else had to go through what I did, and then I'd set up a trust with the money to fund getting these devices and proper training into other places.
Your instant assumption that greed is the motivator is depressing. There was clearly ineptitude in this situation.