Unfortunately we don’t know the details of the exchange at the ATM. However, I do know that in similar situations to this one, the person at the ATM is essentially threatened at the machine while still interacting with it, and forced to withdraw as much as they can. It’s entirely plausible that the $800 stolen was the maximum amount the person could withdraw in a day. I know lots of checking accounts have daily ATM withdrawal limits. Just something to consider.