Joe was not involved in Humper’s business. Humper was the bag man for Joe’s business.
Good grief - did it not occur to any of these nimrods posing as news reporters to ask Joe what the heck Humper was doing on AF2 on trips overseas, China in particular? Did Joe get on the plane and see Humper sitting there and say, “Hey son, I didn’t know you were on this flight! What are you doing on AF2? Wait, don’t tell me. Plausible deniability and all.”