You're probably right, but I'm willing to accept the possibility that Dean would be willing to and could prove his version of events to a third party if requested.
What the people who are still trying to give a chance is missing is the fact that dude had many chances to redeem himself but didn't, hell he even made it worse each time. So, please try to understand people who are warning against him because dude was a serial scammer and a very bad one at that as well.
Maybe he actually did lost that money, maybe he doesn't have any money left, maybe he spend it all on luxury cars or something, it is irrelevant what he did with the money. Dude is basically just a pure evil person and everyone is warning you, you may think that he is "trying to make it all better" by paying or whatever but dude will not, he is literally just a person who will find another way to steal, hence do not ever believe a word he says or your money will be gone too.