The 30 text messages discussing hiding from the drug goons, changing meeting locations, the value of the cocaine he's transporting, etc seem to indicate that he did in fact know. I mean I suppose as he says he could have just been kidding around, but those messages (and that many) don't seem like a joke. Of course only an idiot would send texts about their drug smuggling plans, but then again there is ample evidence in this article this guy was in fact an idiot in many respects.