 How could that be? He knew everyone Oswald was acquainted with and he didn't know of this man. That's how close to Oswald they drew. Scrutinizing Oswald and reporting back to Bobby, his team discovered that Oswald was an informant for the FBI. Learning this, Bobby reasoned, if the FBI is controlling him, he's no problem. Bobby underestimated the role Oswald had been induced to play.