Imagine you're hiking through the woods and you see something unusual. You think you know what it is but, no, it can't be that, right? A skull? Okay, maybe it is a skull but it's most certainly not human, it has to be an animal. It just has to be.
I don't know, I haven't robbed anything in my life, but I just don't see how this was a way to get a bunch of money all at once. Though, really when someone goes to rob anything they're probably pretty desperate and will just take what they can get.