We will continue to discover more about Joseph and Manny as the story unfolds, Manny was a very clever man but sometimes too trusting.
The driver's background is obvious to all who see him, but when someone is in plain sight you have 'see' not just 'look'. At this time the lads have no reason to suspect.
Dishonest and shady people exist everywhere and are not always obvious, at least these were found out, but unfortunately not before they had lined their own pockets. I hope they get caught.
Obviously Manny - like all of the characters - is fictional, like all of my characters he is however based on a mix of people that I know, some of those people unfortunately are no longer with us but they still influence and inspire me.