TN has a strong felony murder statute. You dont need to prove intent, you just need to prove they were perpetrating a related violent felony.
I’m not a lawyer but in this case it seems like management have probably met the criteria for felony theft or kidnapping. Any properly motivated DA could then add a felony murder charge for each death.
Yes he signed up to give his money away. To a charitable trust. Which he and his family controls. And can withdraw from at any time.
It isnt a charity pledge, its a plan to avoid paying taxes.